diff --git a/.gitattributes b/.gitattributes
index 7ccb1f3..22f739a 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -7,6 +7,5 @@
 .gitattributes    export-ignore
 .gitignore        export-ignore
 .scrutinizer.yml  export-ignore
-.travis.yml       export-ignore
 phpunit.xml.dist  export-ignore
 CONTRIBUTING.md   export-ignore
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 3d5c231..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,23 +0,0 @@
-language: php
-
-php:
-  - 7.2
-  - 7.3
-  - nightly
-
-matrix:
-  allow_failures:
-    - php: nightly
-
-before_script:
-  - travis_retry composer self-update
-  - travis_retry composer install --prefer-source --no-interaction --dev
-
-script:
-  - composer validate
-  - mkdir -p build/logs
-  - vendor/bin/phpunit --coverage-text --coverage-clover=coverage.clover
-
-after_script:
-  - if [ "$TRAVIS_PHP_VERSION" != "nightly" ]; then wget https://scrutinizer-ci.com/ocular.phar; fi
-  - if [ "$TRAVIS_PHP_VERSION" != "nightly" ]; then php ocular.phar code-coverage:upload --format=php-clover coverage.clover; fi
diff --git a/README.md b/README.md
index ca49ec5..d62cc39 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # SEO Helper [![Packagist License][badge_license]](LICENSE.md) [![For PHP][badge_php]][link-github-repo]
 
-[![Travis Status][badge_build]][link-travis]
+[![Github Workflow Status][badge_build]][link-github-status]
 [![Coverage Status][badge_coverage]][link-scrutinizer]
 [![Scrutinizer Code Quality][badge_quality]][link-scrutinizer]
 [![SensioLabs Insight][badge_insight]][link-insight]
@@ -51,7 +51,7 @@ If you discover any security related issues, please email arcanedev.maroc@gmail.
 
 [badge_php]:          https://img.shields.io/badge/PHP-Framework%20agnostic-4F5B93.svg?style=flat-square
 [badge_license]:      https://img.shields.io/packagist/l/arcanedev/seo-helper.svg?style=flat-square
-[badge_build]:        https://img.shields.io/travis/ARCANEDEV/SEO-Helper.svg?style=flat-square
+[badge_build]:        https://img.shields.io/github/workflow/status/ARCANEDEV/SEO-Helper/run-tests?style=flat-square
 [badge_coverage]:     https://img.shields.io/scrutinizer/coverage/g/ARCANEDEV/SEO-Helper.svg?style=flat-square
 [badge_quality]:      https://img.shields.io/scrutinizer/g/ARCANEDEV/SEO-Helper.svg?style=flat-square
 [badge_insight]:      https://img.shields.io/sensiolabs/i/73e1a779-7ca7-4a75-b6d3-452d7852187e.svg?style=flat-square
@@ -62,6 +62,7 @@ If you discover any security related issues, please email arcanedev.maroc@gmail.
 
 [link-author]:        https://github.com/arcanedev-maroc
 [link-github-repo]:   https://github.com/ARCANEDEV/SEO-Helper
+[link-github-status]: https://github.com/ARCANEDEV/SEO-Helper/actions
 [link-github-issues]: https://github.com/ARCANEDEV/SEO-Helper/issues
 [link-contributors]:  https://github.com/ARCANEDEV/SEO-Helper/graphs/contributors
 [link-packagist]:     https://packagist.org/packages/arcanedev/seo-helper
diff --git a/composer.json b/composer.json
index cc0a36d..596b8ee 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
     "require": {
         "php":                ">=7.2.0",
         "arcanedev/php-html": "^3.0",
-        "arcanedev/support":  "^5.0"
+        "arcanedev/support":  "^5.1"
     },
     "require-dev": {
         "ext-dom":             "*",
diff --git a/src/Bases/MetaCollection.php b/src/Bases/MetaCollection.php
index b557437..a033001 100644
--- a/src/Bases/MetaCollection.php
+++ b/src/Bases/MetaCollection.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Bases;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Bases;
 
 use Arcanedev\SeoHelper\Contracts\Entities\MetaCollection as MetaCollectionContract;
 use Arcanedev\SeoHelper\Contracts\Helpers\Meta as MetaContract;
@@ -57,7 +61,7 @@ abstract class MetaCollection extends Collection implements MetaCollectionContra
      *
      * @param  string  $prefix
      *
-     * @return \Arcanedev\SeoHelper\Bases\MetaCollection
+     * @return $this
      */
     public function setPrefix($prefix)
     {
@@ -67,7 +71,7 @@ public function setPrefix($prefix)
     }
 
     /* -----------------------------------------------------------------
-     |  Main Functions
+     |  Main Methods
      | -----------------------------------------------------------------
      */
 
@@ -76,7 +80,7 @@ public function setPrefix($prefix)
      *
      * @param  array  $metas
      *
-     * @return \Arcanedev\SeoHelper\Bases\MetaCollection
+     * @return $this
      */
     public function addMany(array $metas)
     {
@@ -93,7 +97,7 @@ public function addMany(array $metas)
      * @param  string        $name
      * @param  string|array  $content
      *
-     * @return \Arcanedev\SeoHelper\Bases\MetaCollection
+     * @return $this
      */
     public function addOne($name, $content)
     {
@@ -109,7 +113,7 @@ public function addOne($name, $content)
      * @param  string        $name
      * @param  string|array  $content
      *
-     * @return \Arcanedev\SeoHelper\Bases\MetaCollection
+     * @return $this
      */
     protected function addMeta($name, $content)
     {
@@ -123,7 +127,7 @@ protected function addMeta($name, $content)
      *
      * @param  array|string  $names
      *
-     * @return \Arcanedev\SeoHelper\Bases\MetaCollection
+     * @return $this
      */
     public function remove($names)
     {
@@ -149,7 +153,7 @@ public function render()
     /**
      * Reset the collection.
      *
-     * @return \Arcanedev\SeoHelper\Bases\MetaCollection
+     * @return $this
      */
     public function reset()
     {
@@ -195,7 +199,7 @@ protected function isIgnored($name)
      *
      * @param  string|array  $keys
      *
-     * @return \Arcanedev\SeoHelper\Bases\MetaCollection
+     * @return $this
      */
     public function forget($keys)
     {
@@ -209,7 +213,7 @@ public function forget($keys)
     /**
      * Refresh meta collection items.
      *
-     * @return \Arcanedev\SeoHelper\Bases\MetaCollection
+     * @return $this
      */
     private function refresh()
     {
diff --git a/src/Contracts/Entities/Analytics.php b/src/Contracts/Entities/Analytics.php
index 4d2925e..c2a7e4a 100644
--- a/src/Contracts/Entities/Analytics.php
+++ b/src/Contracts/Entities/Analytics.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Contracts\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Contracts\Entities;
 
 use Arcanedev\SeoHelper\Contracts\Renderable;
 
@@ -14,6 +18,7 @@ interface Analytics extends Renderable
      |  Getters & Setters
      | -----------------------------------------------------------------
      */
+
     /**
      * Set Google Analytics code.
      *
diff --git a/src/Contracts/Entities/Description.php b/src/Contracts/Entities/Description.php
index c18ee3d..7136913 100644
--- a/src/Contracts/Entities/Description.php
+++ b/src/Contracts/Entities/Description.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Contracts\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Contracts\Entities;
 
 use Arcanedev\SeoHelper\Contracts\Renderable;
 
@@ -14,6 +18,7 @@ interface Description extends Renderable
      |  Getters & Setters
      | -----------------------------------------------------------------
      */
+
     /**
      * Get raw description content.
      *
@@ -33,7 +38,7 @@ public function get();
      *
      * @param  string  $content
      *
-     * @return self
+     * @return $this
      */
     public function set($content);
 
@@ -49,7 +54,7 @@ public function getMax();
      *
      * @param  int  $max
      *
-     * @return self
+     * @return $this
      */
     public function setMax($max);
 
@@ -57,13 +62,14 @@ public function setMax($max);
      |  Main Methods
      | -----------------------------------------------------------------
      */
+
     /**
      * Make a description instance.
      *
      * @param  string  $content
      * @param  int     $max
      *
-     * @return self
+     * @return $this
      */
     public static function make($content, $max = 155);
 }
diff --git a/src/Contracts/Entities/Keywords.php b/src/Contracts/Entities/Keywords.php
index fdfdd53..6cfb607 100644
--- a/src/Contracts/Entities/Keywords.php
+++ b/src/Contracts/Entities/Keywords.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Contracts\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Contracts\Entities;
 
 use Arcanedev\SeoHelper\Contracts\Renderable;
 
@@ -14,6 +18,7 @@ interface Keywords extends Renderable
      |  Getters & Setters
      | -----------------------------------------------------------------
      */
+
     /**
      * Get content.
      *
@@ -26,20 +31,21 @@ public function getContent();
      *
      * @param  array|string  $content
      *
-     * @return self
+     * @return $this
      */
     public function set($content);
 
     /* -----------------------------------------------------------------
-     |  Main Functions
+     |  Main Methods
      | -----------------------------------------------------------------
      */
+
     /**
      * Make Keywords instance.
      *
      * @param  array|string  $keywords
      *
-     * @return self
+     * @return $this
      */
     public static function make($keywords);
 
@@ -48,7 +54,7 @@ public static function make($keywords);
      *
      * @param  string  $keyword
      *
-     * @return self
+     * @return $this
      */
     public function add($keyword);
 
@@ -57,7 +63,7 @@ public function add($keyword);
      *
      * @param  array  $keywords
      *
-     * @return self
+     * @return $this
      */
     public function addMany(array $keywords);
 }
diff --git a/src/Contracts/Entities/MetaCollection.php b/src/Contracts/Entities/MetaCollection.php
index c5f0279..347888f 100644
--- a/src/Contracts/Entities/MetaCollection.php
+++ b/src/Contracts/Entities/MetaCollection.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Contracts\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Contracts\Entities;
 
 use Arcanedev\SeoHelper\Contracts\Renderable;
 
@@ -11,16 +15,17 @@
 interface MetaCollection extends Renderable
 {
     /* -----------------------------------------------------------------
-     |  Main Functions
+     |  Main Methods
      | -----------------------------------------------------------------
      */
+
     /**
      * Add a meta to collection.
      *
      * @param  string        $name
      * @param  string|array  $content
      *
-     * @return self
+     * @return $this
      */
     public function addOne($name, $content);
 
@@ -29,7 +34,7 @@ public function addOne($name, $content);
      *
      * @param  array  $metas
      *
-     * @return self
+     * @return $this
      */
     public function addMany(array $metas);
 
@@ -38,7 +43,7 @@ public function addMany(array $metas);
      *
      * @param  array|string  $names
      *
-     * @return self
+     * @return $this
      */
     public function remove($names);
 }
diff --git a/src/Contracts/Entities/MiscTags.php b/src/Contracts/Entities/MiscTags.php
index 8a6969c..aabbbb7 100644
--- a/src/Contracts/Entities/MiscTags.php
+++ b/src/Contracts/Entities/MiscTags.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Contracts\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Contracts\Entities;
 
 use Arcanedev\SeoHelper\Contracts\Renderable;
 
@@ -27,7 +31,7 @@ public function getUrl();
      *
      * @param  string  $url
      *
-     * @return self
+     * @return $this
      */
     public function setUrl($url);
 
@@ -48,7 +52,7 @@ public function all();
      *
      * @param  array  $defaults
      *
-     * @return self
+     * @return $this
      */
     public static function make(array $defaults = []);
 
@@ -58,7 +62,7 @@ public static function make(array $defaults = []);
      * @param  string  $name
      * @param  string  $content
      *
-     * @return self
+     * @return $this
      */
     public function add($name, $content);
 
@@ -67,7 +71,7 @@ public function add($name, $content);
      *
      * @param  array  $metas
      *
-     * @return self
+     * @return $this
      */
     public function addMany(array $metas);
 
@@ -76,14 +80,14 @@ public function addMany(array $metas);
      *
      * @param  array|string  $names
      *
-     * @return self
+     * @return $this
      */
     public function remove($names);
 
     /**
      * Reset the meta collection.
      *
-     * @return self
+     * @return $this
      */
     public function reset();
 }
diff --git a/src/Contracts/Entities/OpenGraph.php b/src/Contracts/Entities/OpenGraph.php
index 9bd1ea4..01de133 100644
--- a/src/Contracts/Entities/OpenGraph.php
+++ b/src/Contracts/Entities/OpenGraph.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Contracts\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Contracts\Entities;
 
 use Arcanedev\SeoHelper\Contracts\Renderable;
 
@@ -14,12 +18,13 @@ interface OpenGraph extends Renderable
      |  Getters & Setters
      | -----------------------------------------------------------------
      */
+
     /**
      * Set the open graph prefix.
      *
      * @param  string  $prefix
      *
-     * @return self
+     * @return $this
      */
     public function setPrefix($prefix);
 
@@ -28,7 +33,7 @@ public function setPrefix($prefix);
      *
      * @param  string  $type
      *
-     * @return self
+     * @return $this
      */
     public function setType($type);
 
@@ -37,7 +42,7 @@ public function setType($type);
      *
      * @param  string  $title
      *
-     * @return self
+     * @return $this
      */
     public function setTitle($title);
 
@@ -46,7 +51,7 @@ public function setTitle($title);
      *
      * @param  string  $description
      *
-     * @return self
+     * @return $this
      */
     public function setDescription($description);
 
@@ -55,7 +60,7 @@ public function setDescription($description);
      *
      * @param  string  $url
      *
-     * @return self
+     * @return $this
      */
     public function setUrl($url);
 
@@ -64,7 +69,7 @@ public function setUrl($url);
      *
      * @param  string  $image
      *
-     * @return self
+     * @return $this
      */
     public function setImage($image);
 
@@ -73,7 +78,7 @@ public function setImage($image);
      *
      * @param  string  $siteName
      *
-     * @return self
+     * @return $this
      */
     public function setSiteName($siteName);
 
@@ -100,7 +105,7 @@ public function setAlternativeLocales(array $locales);
      *
      * @param  array  $properties
      *
-     * @return self
+     * @return $this
      */
     public function addProperties(array $properties);
 
@@ -110,7 +115,7 @@ public function addProperties(array $properties);
      * @param  string        $property
      * @param  string|array  $content
      *
-     * @return self
+     * @return $this
      */
     public function addProperty($property, $content);
 }
diff --git a/src/Contracts/Entities/Title.php b/src/Contracts/Entities/Title.php
index 430d01e..b474c0d 100644
--- a/src/Contracts/Entities/Title.php
+++ b/src/Contracts/Entities/Title.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Contracts\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Contracts\Entities;
 
 use Arcanedev\SeoHelper\Contracts\Renderable;
 
@@ -14,6 +18,7 @@ interface Title extends Renderable
      |  Getters & Setters
      | -----------------------------------------------------------------
      */
+
     /**
      * Get title only (without site name or separator).
      *
@@ -26,7 +31,7 @@ public function getTitleOnly();
      *
      * @param  string  $title
      *
-     * @return self
+     * @return $this
      */
     public function set($title);
 
@@ -42,21 +47,21 @@ public function getSiteName();
      *
      * @param  string  $siteName
      *
-     * @return self
+     * @return $this
      */
     public function setSiteName($siteName);
 
     /**
      * Hide the site name.
      *
-     * @return self
+     * @return $this
      */
     public function hideSiteName();
 
     /**
      * Show the site name.
      *
-     * @return self
+     * @return $this
      */
     public function showSiteName();
 
@@ -65,7 +70,7 @@ public function showSiteName();
      *
      * @param  bool  $visible
      *
-     * @return self
+     * @return $this
      */
     public function setSiteNameVisibility($visible);
 
@@ -81,21 +86,21 @@ public function getSeparator();
      *
      * @param  string  $separator
      *
-     * @return self
+     * @return $this
      */
     public function setSeparator($separator);
 
     /**
      * Set title first.
      *
-     * @return self
+     * @return $this
      */
     public function setFirst();
 
     /**
      * Set title last.
      *
-     * @return self
+     * @return $this
      */
     public function setLast();
 
@@ -107,7 +112,7 @@ public function setLast();
     public function isTitleFirst();
 
     /**
-     * Get title max lenght.
+     * Get title max length.
      *
      * @return int
      */
@@ -118,7 +123,7 @@ public function getMax();
      *
      * @param  int  $max
      *
-     * @return self
+     * @return $this
      */
     public function setMax($max);
 
@@ -126,6 +131,7 @@ public function setMax($max);
      |  Main Methods
      | -----------------------------------------------------------------
      */
+
     /**
      * Make a Title instance.
      *
@@ -133,7 +139,7 @@ public function setMax($max);
      * @param  string  $siteName
      * @param  string  $separator
      *
-     * @return self
+     * @return $this
      */
     public static function make($title, $siteName = '', $separator = '-');
 }
diff --git a/src/Contracts/Entities/TwitterCard.php b/src/Contracts/Entities/TwitterCard.php
index e83b9e9..d98231f 100644
--- a/src/Contracts/Entities/TwitterCard.php
+++ b/src/Contracts/Entities/TwitterCard.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Contracts\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Contracts\Entities;
 
 use Arcanedev\SeoHelper\Contracts\Renderable;
 
@@ -14,6 +18,7 @@ interface TwitterCard extends Renderable
      |  Constants
      | -----------------------------------------------------------------
      */
+
     const TYPE_APP                 = 'app';
     const TYPE_GALLERY             = 'gallery';
     const TYPE_PHOTO               = 'photo';
@@ -26,12 +31,13 @@ interface TwitterCard extends Renderable
      |  Getters & Setters
      | -----------------------------------------------------------------
      */
+
     /**
      * Set the card type.
      *
      * @param  string  $type
      *
-     * @return self
+     * @return $this
      */
     public function setType($type);
 
@@ -40,7 +46,7 @@ public function setType($type);
      *
      * @param  string  $site
      *
-     * @return self
+     * @return $this
      */
     public function setSite($site);
 
@@ -49,7 +55,7 @@ public function setSite($site);
      *
      * @param  string  $title
      *
-     * @return self
+     * @return $this
      */
     public function setTitle($title);
 
@@ -58,7 +64,7 @@ public function setTitle($title);
      *
      * @param  string  $description
      *
-     * @return self
+     * @return $this
      */
     public function setDescription($description);
 
@@ -67,7 +73,7 @@ public function setDescription($description);
      *
      * @param  string  $url
      *
-     * @return self
+     * @return $this
      */
     public function addImage($url);
 
@@ -76,7 +82,7 @@ public function addImage($url);
      *
      * @param  array  $metas
      *
-     * @return self
+     * @return $this
      */
     public function addMetas(array $metas);
 
@@ -86,7 +92,7 @@ public function addMetas(array $metas);
      * @param  string        $name
      * @param  string|array  $content
      *
-     * @return self
+     * @return $this
      */
     public function addMeta($name, $content);
 
@@ -101,10 +107,11 @@ public function types();
      |  Main Methods
      | -----------------------------------------------------------------
      */
+
     /**
      * Reset the card.
      *
-     * @return self
+     * @return $this
      */
     public function reset();
 }
diff --git a/src/Contracts/Entities/Webmasters.php b/src/Contracts/Entities/Webmasters.php
index c235b84..cf5f71f 100644
--- a/src/Contracts/Entities/Webmasters.php
+++ b/src/Contracts/Entities/Webmasters.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Contracts\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Contracts\Entities;
 
 use Arcanedev\SeoHelper\Contracts\Renderable;
 
@@ -32,7 +36,7 @@ public function all();
      *
      * @param  array  $webmasters
      *
-     * @return self
+     * @return $this
      */
     public static function make(array $webmasters = []);
 
@@ -42,14 +46,14 @@ public static function make(array $webmasters = []);
      * @param  string  $webmaster
      * @param  string  $content
      *
-     * @return self
+     * @return $this
      */
     public function add($webmaster, $content);
 
     /**
      * Reset the webmaster collection.
      *
-     * @return self
+     * @return $this
      */
     public function reset();
 }
diff --git a/src/Contracts/Helpers/Meta.php b/src/Contracts/Helpers/Meta.php
index aaddf87..cc9ba55 100644
--- a/src/Contracts/Helpers/Meta.php
+++ b/src/Contracts/Helpers/Meta.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Contracts\Helpers;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Contracts\Helpers;
 
 use Arcanedev\SeoHelper\Contracts\Renderable;
 
@@ -14,6 +18,7 @@ interface Meta extends Renderable
      |  Getters and Setters
      | -----------------------------------------------------------------
      */
+
     /**
      * Get the meta name.
      *
@@ -26,7 +31,7 @@ public function key();
      *
      * @param  string  $prefix
      *
-     * @return self
+     * @return $this
      */
     public function setPrefix($prefix);
 
@@ -35,7 +40,7 @@ public function setPrefix($prefix);
      *
      * @param  string  $nameProperty
      *
-     * @return self
+     * @return $this
      */
     public function setNameProperty($nameProperty);
 
@@ -43,6 +48,7 @@ public function setNameProperty($nameProperty);
      |  Main Methods
      | -----------------------------------------------------------------
      */
+
     /**
      * Make Meta instance.
      *
@@ -51,7 +57,7 @@ public function setNameProperty($nameProperty);
      * @param  string        $propertyName
      * @param  string        $prefix
      *
-     * @return self
+     * @return $this
      */
     public static function make($name, $content, $propertyName = 'name', $prefix = '');
 
diff --git a/src/Contracts/Renderable.php b/src/Contracts/Renderable.php
index 93f3935..8dcc71b 100644
--- a/src/Contracts/Renderable.php
+++ b/src/Contracts/Renderable.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Contracts;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Contracts;
 
 /**
  * Interface  Renderable
diff --git a/src/Contracts/SeoHelper.php b/src/Contracts/SeoHelper.php
index d78b82b..1c92725 100644
--- a/src/Contracts/SeoHelper.php
+++ b/src/Contracts/SeoHelper.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Contracts;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Contracts;
 
 /**
  * Interface  SeoHelper
@@ -24,7 +28,7 @@ public function meta();
      *
      * @param  \Arcanedev\SeoHelper\Contracts\SeoMeta  $seoMeta
      *
-     * @return self
+     * @return $this
      */
     public function setSeoMeta(SeoMeta $seoMeta);
 
@@ -49,7 +53,7 @@ public function og();
      *
      * @param  \Arcanedev\SeoHelper\Contracts\SeoOpenGraph  $seoOpenGraph
      *
-     * @return self
+     * @return $this
      */
     public function setSeoOpenGraph(SeoOpenGraph $seoOpenGraph);
 
@@ -65,7 +69,7 @@ public function twitter();
      *
      * @param  \Arcanedev\SeoHelper\Contracts\SeoTwitter  $seoTwitter
      *
-     * @return self
+     * @return $this
      */
     public function setSeoTwitter(SeoTwitter $seoTwitter);
 
@@ -76,7 +80,7 @@ public function setSeoTwitter(SeoTwitter $seoTwitter);
      * @param  string|null  $siteName
      * @param  string|null  $separator
      *
-     * @return self
+     * @return $this
      */
     public function setTitle($title, $siteName = null, $separator = null);
 
@@ -85,21 +89,21 @@ public function setTitle($title, $siteName = null, $separator = null);
      *
      * @param  string  $siteName
      *
-     * @return self
+     * @return $this
      */
     public function setSiteName($siteName);
 
     /**
      * Hide the site name.
      *
-     * @return self
+     * @return $this
      */
     public function hideSiteName();
 
     /**
      * Show the site name.
      *
-     * @return self
+     * @return $this
      */
     public function showSiteName();
 
@@ -108,7 +112,7 @@ public function showSiteName();
      *
      * @param  string  $description
      *
-     * @return self
+     * @return $this
      */
     public function setDescription($description);
 
@@ -117,7 +121,7 @@ public function setDescription($description);
      *
      * @param  array|string  $keywords
      *
-     * @return self
+     * @return $this
      */
     public function setKeywords($keywords);
 
@@ -153,28 +157,28 @@ public function renderHtml();
     /**
      * Enable the OpenGraph.
      *
-     * @return self
+     * @return $this
      */
     public function enableOpenGraph();
 
     /**
      * Disable the OpenGraph.
      *
-     * @return self
+     * @return $this
      */
     public function disableOpenGraph();
 
     /**
      * Enable the Twitter Card.
      *
-     * @return self
+     * @return $this
      */
     public function enableTwitter();
 
     /**
      * Disable the Twitter Card.
      *
-     * @return self
+     * @return $this
      */
     public function disableTwitter();
 }
diff --git a/src/Contracts/SeoMeta.php b/src/Contracts/SeoMeta.php
index ce2c66b..bfdaaff 100644
--- a/src/Contracts/SeoMeta.php
+++ b/src/Contracts/SeoMeta.php
@@ -1,11 +1,17 @@
-<?php namespace Arcanedev\SeoHelper\Contracts;
+<?php
 
-use Arcanedev\SeoHelper\Contracts\Entities\Analytics as AnalyticsContract;
-use Arcanedev\SeoHelper\Contracts\Entities\Description as DescriptionContract;
-use Arcanedev\SeoHelper\Contracts\Entities\Keywords as KeywordsContract;
-use Arcanedev\SeoHelper\Contracts\Entities\MiscTags as MiscTagsContract;
-use Arcanedev\SeoHelper\Contracts\Entities\Title as TitleContract;
-use Arcanedev\SeoHelper\Contracts\Entities\Webmasters as WebmastersContract;
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Contracts;
+
+use Arcanedev\SeoHelper\Contracts\Entities\{
+    Analytics as AnalyticsContract,
+    Description as DescriptionContract,
+    Keywords as KeywordsContract,
+    MiscTags as MiscTagsContract,
+    Title as TitleContract,
+    Webmasters as WebmastersContract
+};
 
 /**
  * Interface  SeoMeta
@@ -24,7 +30,7 @@ interface SeoMeta extends Renderable
      *
      * @param  \Arcanedev\SeoHelper\Contracts\Entities\Title  $title
      *
-     * @return self
+     * @return $this
      */
     public function title(TitleContract $title);
 
@@ -40,7 +46,7 @@ public function getTitleEntity();
      *
      * @param  \Arcanedev\SeoHelper\Contracts\Entities\Description  $description
      *
-     * @return self
+     * @return $this
      */
     public function description(DescriptionContract $description);
 
@@ -56,7 +62,7 @@ public function getDescriptionEntity();
      *
      * @param  \Arcanedev\SeoHelper\Contracts\Entities\Keywords  $keywords
      *
-     * @return self
+     * @return $this
      */
     public function keywords(KeywordsContract $keywords);
 
@@ -72,7 +78,7 @@ public function getKeywordsEntity();
      *
      * @param  \Arcanedev\SeoHelper\Contracts\Entities\MiscTags  $misc
      *
-     * @return self
+     * @return $this
      */
     public function misc(MiscTagsContract $misc);
 
@@ -88,7 +94,7 @@ public function getMiscEntity();
      *
      * @param  \Arcanedev\SeoHelper\Contracts\Entities\Webmasters  $webmasters
      *
-     * @return self
+     * @return $this
      */
     public function webmasters(WebmastersContract $webmasters);
 
@@ -122,7 +128,7 @@ public function getAnalyticsEntity();
      * @param  string  $siteName
      * @param  string  $separator
      *
-     * @return self
+     * @return $this
      */
     public function setTitle($title, $siteName = null, $separator = null);
 
@@ -131,21 +137,21 @@ public function setTitle($title, $siteName = null, $separator = null);
      *
      * @param  string  $siteName
      *
-     * @return self
+     * @return $this
      */
     public function setSiteName($siteName);
 
     /**
      * Hide site name.
      *
-     * @return self
+     * @return $this
      */
     public function hideSiteName();
 
     /**
      * Show site name.
      *
-     * @return self
+     * @return $this
      */
     public function showSiteName();
 
@@ -154,7 +160,7 @@ public function showSiteName();
      *
      * @param  string  $content
      *
-     * @return self
+     * @return $this
      */
     public function setDescription($content);
 
@@ -163,7 +169,7 @@ public function setDescription($content);
      *
      * @param  array|string  $content
      *
-     * @return self
+     * @return $this
      */
     public function setKeywords($content);
 
@@ -172,7 +178,7 @@ public function setKeywords($content);
      *
      * @param  string  $keyword
      *
-     * @return self
+     * @return $this
      */
     public function addKeyword($keyword);
 
@@ -181,7 +187,7 @@ public function addKeyword($keyword);
      *
      * @param  array  $keywords
      *
-     * @return self
+     * @return $this
      */
     public function addKeywords(array $keywords);
 
@@ -191,7 +197,7 @@ public function addKeywords(array $keywords);
      * @param  string  $webmaster
      * @param  string  $content
      *
-     * @return self
+     * @return $this
      */
     public function addWebmaster($webmaster, $content);
 
@@ -200,7 +206,7 @@ public function addWebmaster($webmaster, $content);
      *
      * @param  string  $url
      *
-     * @return self
+     * @return $this
      */
     public function setUrl($url);
 
@@ -209,7 +215,7 @@ public function setUrl($url);
      *
      * @param  string  $code
      *
-     * @return self
+     * @return $this
      */
     public function setGoogleAnalytics($code);
 
@@ -223,7 +229,7 @@ public function setGoogleAnalytics($code);
      * @param  string  $name
      * @param  string  $content
      *
-     * @return self
+     * @return $this
      */
     public function addMeta($name, $content);
 
@@ -232,7 +238,7 @@ public function addMeta($name, $content);
      *
      * @param  array  $metas
      *
-     * @return self
+     * @return $this
      */
     public function addMetas(array $metas);
 
@@ -241,21 +247,21 @@ public function addMetas(array $metas);
      *
      * @param  string|array  $names
      *
-     * @return self
+     * @return $this
      */
     public function removeMeta($names);
 
     /**
      * Reset the meta collection except the description and keywords metas.
      *
-     * @return self
+     * @return $this
      */
     public function resetMetas();
 
     /**
      * Reset all webmaster tool site verifier metas.
      *
-     * @return self
+     * @return $this
      */
     public function resetWebmasters();
 }
diff --git a/src/Contracts/SeoOpenGraph.php b/src/Contracts/SeoOpenGraph.php
index 130d7e2..fbc0937 100644
--- a/src/Contracts/SeoOpenGraph.php
+++ b/src/Contracts/SeoOpenGraph.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Contracts;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Contracts;
 
 use Arcanedev\SeoHelper\Contracts\Entities\OpenGraph as OpenGraphContract;
 
@@ -19,7 +23,7 @@ interface SeoOpenGraph extends Renderable
      *
      * @param  \Arcanedev\SeoHelper\Contracts\Entities\OpenGraph  $openGraph
      *
-     * @return self
+     * @return $this
      */
     public function setOpenGraph(OpenGraphContract $openGraph);
 
@@ -28,7 +32,7 @@ public function setOpenGraph(OpenGraphContract $openGraph);
      *
      * @param  string  $prefix
      *
-     * @return self
+     * @return $this
      */
     public function setPrefix($prefix);
 
@@ -37,7 +41,7 @@ public function setPrefix($prefix);
      *
      * @param  string  $type
      *
-     * @return self
+     * @return $this
      */
     public function setType($type);
 
@@ -46,7 +50,7 @@ public function setType($type);
      *
      * @param  string  $title
      *
-     * @return self
+     * @return $this
      */
     public function setTitle($title);
 
@@ -55,7 +59,7 @@ public function setTitle($title);
      *
      * @param  string  $description
      *
-     * @return self
+     * @return $this
      */
     public function setDescription($description);
 
@@ -64,7 +68,7 @@ public function setDescription($description);
      *
      * @param  string  $url
      *
-     * @return self
+     * @return $this
      */
     public function setUrl($url);
 
@@ -73,7 +77,7 @@ public function setUrl($url);
      *
      * @param  string  $image
      *
-     * @return self
+     * @return $this
      */
     public function setImage($image);
 
@@ -82,7 +86,7 @@ public function setImage($image);
      *
      * @param  string  $siteName
      *
-     * @return self
+     * @return $this
      */
     public function setSiteName($siteName);
 
@@ -109,7 +113,7 @@ public function setAlternativeLocales(array $locales);
      *
      * @param  array  $properties
      *
-     * @return self
+     * @return $this
      */
     public function addProperties(array $properties);
 
@@ -119,7 +123,7 @@ public function addProperties(array $properties);
      * @param  string  $property
      * @param  string  $content
      *
-     * @return self
+     * @return $this
      */
     public function addProperty($property, $content);
 
@@ -130,14 +134,14 @@ public function addProperty($property, $content);
     /**
      * Enable the OpenGraph.
      *
-     * @return self
+     * @return $this
      */
     public function enable();
 
     /**
      * Disable the OpenGraph.
      *
-     * @return self
+     * @return $this
      */
     public function disable();
 
diff --git a/src/Contracts/SeoTwitter.php b/src/Contracts/SeoTwitter.php
index da8469c..c63c5cf 100644
--- a/src/Contracts/SeoTwitter.php
+++ b/src/Contracts/SeoTwitter.php
@@ -1,6 +1,10 @@
-<?php namespace Arcanedev\SeoHelper\Contracts;
+<?php
 
-use \Arcanedev\SeoHelper\Contracts\Entities\TwitterCard as CardContract;
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Contracts;
+
+use Arcanedev\SeoHelper\Contracts\Entities\TwitterCard as CardContract;
 
 /**
  * Interface  SeoTwitter
@@ -19,7 +23,7 @@ interface SeoTwitter extends Renderable
      *
      * @param  \Arcanedev\SeoHelper\Contracts\Entities\TwitterCard  $card
      *
-     * @return self
+     * @return $this
      */
     public function setCard(CardContract $card);
 
@@ -28,7 +32,7 @@ public function setCard(CardContract $card);
      *
      * @param  string  $type
      *
-     * @return self
+     * @return $this
      */
     public function setType($type);
 
@@ -37,7 +41,7 @@ public function setType($type);
      *
      * @param  string  $site
      *
-     * @return self
+     * @return $this
      */
     public function setSite($site);
 
@@ -46,7 +50,7 @@ public function setSite($site);
      *
      * @param  string  $title
      *
-     * @return self
+     * @return $this
      */
     public function setTitle($title);
 
@@ -55,7 +59,7 @@ public function setTitle($title);
      *
      * @param  string  $description
      *
-     * @return self
+     * @return $this
      */
     public function setDescription($description);
 
@@ -64,7 +68,7 @@ public function setDescription($description);
      *
      * @param  string  $url
      *
-     * @return self
+     * @return $this
      */
     public function addImage($url);
 
@@ -73,7 +77,7 @@ public function addImage($url);
      *
      * @param  array  $metas
      *
-     * @return self
+     * @return $this
      */
     public function addMetas(array $metas);
 
@@ -83,7 +87,7 @@ public function addMetas(array $metas);
      * @param  string  $name
      * @param  string  $content
      *
-     * @return self
+     * @return $this
      */
     public function addMeta($name, $content);
 
@@ -94,21 +98,21 @@ public function addMeta($name, $content);
     /**
      * Reset the twitter card.
      *
-     * @return self
+     * @return $this
      */
     public function reset();
 
     /**
      * Enable the Twitter Card.
      *
-     * @return self
+     * @return $this
      */
     public function enable();
 
     /**
      * Disable the Twitter Card.
      *
-     * @return self
+     * @return $this
      */
     public function disable();
 
diff --git a/src/Entities/Analytics.php b/src/Entities/Analytics.php
index 6c8fa83..ed0c78f 100644
--- a/src/Entities/Analytics.php
+++ b/src/Entities/Analytics.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Entities;
 
 use Arcanedev\SeoHelper\Contracts\Entities\Analytics as AnalyticsContract;
 use Arcanedev\Support\Traits\Configurable;
@@ -57,7 +61,7 @@ public function __construct(array $configs = [])
      *
      * @param  string  $code
      *
-     * @return \Arcanedev\SeoHelper\Entities\Analytics
+     * @return $this
      */
     public function setGoogle($code)
     {
diff --git a/src/Entities/Description.php b/src/Entities/Description.php
index 809f837..905006e 100644
--- a/src/Entities/Description.php
+++ b/src/Entities/Description.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Entities;
 
 use Arcanedev\Html\Elements\Meta;
 use Arcanedev\SeoHelper\Contracts\Entities\Description as DescriptionContract;
@@ -94,7 +98,7 @@ public function get()
      *
      * @param  string  $content
      *
-     * @return self
+     * @return $this
      */
     public function set($content)
     {
@@ -118,7 +122,7 @@ public function getMax()
      *
      * @param  int  $max
      *
-     * @return self
+     * @return $this
      */
     public function setMax($max)
     {
@@ -140,7 +144,7 @@ public function setMax($max)
      * @param  string  $content
      * @param  int     $max
      *
-     * @return self
+     * @return $this
      */
     public static function make($content, $max = 155)
     {
diff --git a/src/Entities/Keywords.php b/src/Entities/Keywords.php
index 040cb2c..d5aabd8 100644
--- a/src/Entities/Keywords.php
+++ b/src/Entities/Keywords.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Entities;
 
 use Arcanedev\Html\Elements\Meta;
 use Arcanedev\SeoHelper\Contracts\Entities\Keywords as KeywordsContract;
@@ -84,19 +88,17 @@ public function get()
      *
      * @param  array|string  $content
      *
-     * @return self
+     * @return $this
      */
     public function set($content)
     {
-        if (is_string($content))
+        if (is_string($content)) {
             $content = explode(',', $content);
-
-        if ( ! is_array($content))
-            $content = (array) $content;
+        }
 
         $this->content = array_map(function ($keyword) {
             return $this->clean($keyword);
-        }, $content);
+        }, (array) $content);
 
         return $this;
     }
@@ -111,7 +113,7 @@ public function set($content)
      *
      * @param  array|string  $keywords
      *
-     * @return self
+     * @return $this
      */
     public static function make($keywords)
     {
@@ -123,7 +125,7 @@ public static function make($keywords)
      *
      * @param  string  $keyword
      *
-     * @return self
+     * @return $this
      */
     public function add($keyword)
     {
@@ -137,7 +139,7 @@ public function add($keyword)
      *
      * @param  array  $keywords
      *
-     * @return self
+     * @return $this
      */
     public function addMany(array $keywords)
     {
diff --git a/src/Entities/MetaCollection.php b/src/Entities/MetaCollection.php
index e706938..b3afb4c 100644
--- a/src/Entities/MetaCollection.php
+++ b/src/Entities/MetaCollection.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Entities;
 
 use Arcanedev\SeoHelper\Bases\MetaCollection as BaseMetaCollection;
 use Arcanedev\SeoHelper\Helpers\Meta;
@@ -37,7 +41,7 @@ class MetaCollection extends BaseMetaCollection
      * @param  string  $name
      * @param  string  $content
      *
-     * @return \Arcanedev\SeoHelper\Entities\MetaCollection
+     * @return $this
      */
     public function addOne($name, $content)
     {
diff --git a/src/Entities/MiscTags.php b/src/Entities/MiscTags.php
index 1d76b40..9397b13 100644
--- a/src/Entities/MiscTags.php
+++ b/src/Entities/MiscTags.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Entities;
 
 use Arcanedev\SeoHelper\Contracts\Entities\MiscTags as MiscTagsContract;
 use Arcanedev\Support\Traits\Configurable;
@@ -85,7 +89,7 @@ public function getUrl()
      *
      * @param  string  $url
      *
-     * @return \Arcanedev\SeoHelper\Entities\MiscTags
+     * @return $this
      */
     public function setUrl($url)
     {
@@ -115,7 +119,7 @@ public function all()
      *
      * @param  array  $defaults
      *
-     * @return \Arcanedev\SeoHelper\Entities\MiscTags
+     * @return $this
      */
     public static function make(array $defaults = [])
     {
@@ -128,7 +132,7 @@ public static function make(array $defaults = [])
      * @param  string  $name
      * @param  string  $content
      *
-     * @return \Arcanedev\SeoHelper\Entities\MiscTags
+     * @return $this
      */
     public function add($name, $content)
     {
@@ -142,7 +146,7 @@ public function add($name, $content)
      *
      * @param  array  $metas
      *
-     * @return \Arcanedev\SeoHelper\Entities\MiscTags
+     * @return $this
      */
     public function addMany(array $metas)
     {
@@ -156,7 +160,7 @@ public function addMany(array $metas)
      *
      * @param  array|string  $names
      *
-     * @return \Arcanedev\SeoHelper\Entities\MiscTags
+     * @return $this
      */
     public function remove($names)
     {
@@ -168,7 +172,7 @@ public function remove($names)
     /**
      * Reset the meta collection.
      *
-     * @return \Arcanedev\SeoHelper\Entities\MiscTags
+     * @return $this
      */
     public function reset()
     {
@@ -240,7 +244,7 @@ private function isRobotsEnabled(): bool
     /**
      * Add the robots meta.
      *
-     * @return \Arcanedev\SeoHelper\Entities\MiscTags
+     * @return $this
      */
     private function addRobotsMeta(): self
     {
@@ -253,7 +257,7 @@ private function addRobotsMeta(): self
     /**
      * Add the canonical link.
      *
-     * @return \Arcanedev\SeoHelper\Entities\MiscTags
+     * @return $this
      */
     private function addCanonical(): self
     {
diff --git a/src/Entities/OpenGraph/Graph.php b/src/Entities/OpenGraph/Graph.php
index 06bce1f..e16e70b 100644
--- a/src/Entities/OpenGraph/Graph.php
+++ b/src/Entities/OpenGraph/Graph.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Entities\OpenGraph;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Entities\OpenGraph;
 
 use Arcanedev\SeoHelper\Contracts\Entities\OpenGraph as OpenGraphContract;
 use Arcanedev\Support\Traits\Configurable;
@@ -71,7 +75,7 @@ private function init()
      *
      * @param  string  $prefix
      *
-     * @return \Arcanedev\SeoHelper\Entities\OpenGraph\Graph
+     * @return $this
      */
     public function setPrefix($prefix)
     {
@@ -85,7 +89,7 @@ public function setPrefix($prefix)
      *
      * @param  string  $type
      *
-     * @return \Arcanedev\SeoHelper\Entities\OpenGraph\Graph
+     * @return $this
      */
     public function setType($type)
     {
@@ -97,7 +101,7 @@ public function setType($type)
      *
      * @param  string  $title
      *
-     * @return \Arcanedev\SeoHelper\Entities\OpenGraph\Graph
+     * @return $this
      */
     public function setTitle($title)
     {
@@ -109,7 +113,7 @@ public function setTitle($title)
      *
      * @param  string  $description
      *
-     * @return \Arcanedev\SeoHelper\Entities\OpenGraph\Graph
+     * @return $this
      */
     public function setDescription($description)
     {
@@ -121,7 +125,7 @@ public function setDescription($description)
      *
      * @param  string  $url
      *
-     * @return \Arcanedev\SeoHelper\Entities\OpenGraph\Graph
+     * @return $this
      */
     public function setUrl($url)
     {
@@ -133,7 +137,7 @@ public function setUrl($url)
      *
      * @param  string  $image
      *
-     * @return \Arcanedev\SeoHelper\Entities\OpenGraph\Graph
+     * @return $this
      */
     public function setImage($image)
     {
@@ -145,7 +149,7 @@ public function setImage($image)
      *
      * @param  string  $siteName
      *
-     * @return \Arcanedev\SeoHelper\Entities\OpenGraph\Graph
+     * @return $this
      */
     public function setSiteName($siteName)
     {
@@ -157,7 +161,7 @@ public function setSiteName($siteName)
      *
      * @param  string  $locale
      *
-     * @return \Arcanedev\SeoHelper\Entities\OpenGraph\Graph
+     * @return $this
      */
     public function setLocale($locale)
     {
@@ -169,7 +173,7 @@ public function setLocale($locale)
      *
      * @param  array  $locales
      *
-     * @return \Arcanedev\SeoHelper\Entities\OpenGraph\Graph
+     * @return $this
      */
     public function setAlternativeLocales(array $locales)
     {
@@ -181,7 +185,7 @@ public function setAlternativeLocales(array $locales)
      *
      * @param  array  $properties
      *
-     * @return \Arcanedev\SeoHelper\Entities\OpenGraph\Graph
+     * @return $this
      */
     public function addProperties(array $properties)
     {
@@ -196,7 +200,7 @@ public function addProperties(array $properties)
      * @param  string        $property
      * @param  string|array  $content
      *
-     * @return \Arcanedev\SeoHelper\Entities\OpenGraph\Graph
+     * @return $this
      */
     public function addProperty($property, $content)
     {
diff --git a/src/Entities/OpenGraph/MetaCollection.php b/src/Entities/OpenGraph/MetaCollection.php
index ac46955..0efe2f0 100644
--- a/src/Entities/OpenGraph/MetaCollection.php
+++ b/src/Entities/OpenGraph/MetaCollection.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Entities\OpenGraph;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Entities\OpenGraph;
 
 use Arcanedev\SeoHelper\Bases\MetaCollection as BaseMetaCollection;
 
diff --git a/src/Entities/Title.php b/src/Entities/Title.php
index fb84d01..4fb2e7b 100644
--- a/src/Entities/Title.php
+++ b/src/Entities/Title.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Entities;
 
 use Arcanedev\Html\Elements\Element;
 use Arcanedev\SeoHelper\Contracts\Entities\Title as TitleContract;
@@ -118,7 +122,7 @@ public function getTitleOnly()
      *
      * @param  string  $title
      *
-     * @return \Arcanedev\SeoHelper\Entities\Title
+     * @return $this
      */
     public function set($title)
     {
@@ -143,7 +147,7 @@ public function getSiteName()
      *
      * @param  string  $siteName
      *
-     * @return \Arcanedev\SeoHelper\Entities\Title
+     * @return $this
      */
     public function setSiteName($siteName)
     {
@@ -156,7 +160,7 @@ public function setSiteName($siteName)
     /**
      * Hide the site name.
      *
-     * @return \Arcanedev\SeoHelper\Entities\Title
+     * @return $this
      */
     public function hideSiteName()
     {
@@ -166,7 +170,7 @@ public function hideSiteName()
     /**
      * Show the site name.
      *
-     * @return \Arcanedev\SeoHelper\Entities\Title
+     * @return $this
      */
     public function showSiteName()
     {
@@ -178,7 +182,7 @@ public function showSiteName()
      *
      * @param  bool  $visible
      *
-     * @return \Arcanedev\SeoHelper\Entities\Title
+     * @return $this
      */
     public function setSiteNameVisibility($visible)
     {
@@ -202,7 +206,7 @@ public function getSeparator()
      *
      * @param  string  $separator
      *
-     * @return \Arcanedev\SeoHelper\Entities\Title
+     * @return $this
      */
     public function setSeparator($separator)
     {
@@ -215,7 +219,7 @@ public function setSeparator($separator)
     /**
      * Set title first.
      *
-     * @return \Arcanedev\SeoHelper\Entities\Title
+     * @return $this
      */
     public function setFirst()
     {
@@ -225,7 +229,7 @@ public function setFirst()
     /**
      * Set title last.
      *
-     * @return \Arcanedev\SeoHelper\Entities\Title
+     * @return $this
      */
     public function setLast()
     {
@@ -237,7 +241,7 @@ public function setLast()
      *
      * @param  bool  $first
      *
-     * @return \Arcanedev\SeoHelper\Entities\Title
+     * @return $this
      */
     private function switchPosition($first)
     {
@@ -271,7 +275,7 @@ public function getMax()
      *
      * @param  int  $max
      *
-     * @return \Arcanedev\SeoHelper\Entities\Title
+     * @return $this
      */
     public function setMax($max)
     {
@@ -294,7 +298,7 @@ public function setMax($max)
      * @param  string  $siteName
      * @param  string  $separator
      *
-     * @return \Arcanedev\SeoHelper\Entities\Title
+     * @return $this
      */
     public static function make($title, $siteName = '', $separator = '-')
     {
diff --git a/src/Entities/Twitter/Card.php b/src/Entities/Twitter/Card.php
index c8535a9..a07bb72 100644
--- a/src/Entities/Twitter/Card.php
+++ b/src/Entities/Twitter/Card.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Entities\Twitter;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Entities\Twitter;
 
 use Arcanedev\SeoHelper\Contracts\Entities\TwitterCard as CardContract;
 use Arcanedev\SeoHelper\Exceptions\InvalidTwitterCardException;
@@ -67,7 +71,7 @@ public function __construct(array $configs = [])
     /**
      * Start the engine.
      *
-     * @return \Arcanedev\SeoHelper\Entities\Twitter\Card
+     * @return $this
      */
     private function init()
     {
@@ -90,7 +94,7 @@ private function init()
      *
      * @param  string  $prefix
      *
-     * @return \Arcanedev\SeoHelper\Entities\Twitter\Card
+     * @return $this
      */
     private function setPrefix($prefix)
     {
@@ -104,7 +108,7 @@ private function setPrefix($prefix)
      *
      * @param  string  $type
      *
-     * @return \Arcanedev\SeoHelper\Entities\Twitter\Card
+     * @return $this
      */
     public function setType($type)
     {
@@ -121,7 +125,7 @@ public function setType($type)
      *
      * @param  string  $site
      *
-     * @return \Arcanedev\SeoHelper\Entities\Twitter\Card
+     * @return $this
      */
     public function setSite($site)
     {
@@ -137,7 +141,7 @@ public function setSite($site)
      *
      * @param  string  $title
      *
-     * @return \Arcanedev\SeoHelper\Entities\Twitter\Card
+     * @return $this
      */
     public function setTitle($title)
     {
@@ -149,7 +153,7 @@ public function setTitle($title)
      *
      * @param  string  $description
      *
-     * @return \Arcanedev\SeoHelper\Entities\Twitter\Card
+     * @return $this
      */
     public function setDescription($description)
     {
@@ -161,7 +165,7 @@ public function setDescription($description)
      *
      * @param  string  $url
      *
-     * @return \Arcanedev\SeoHelper\Entities\Twitter\Card
+     * @return $this
      */
     public function addImage($url)
     {
@@ -177,7 +181,7 @@ public function addImage($url)
      *
      * @param  array  $metas
      *
-     * @return \Arcanedev\SeoHelper\Entities\Twitter\Card
+     * @return $this
      */
     public function addMetas(array $metas)
     {
@@ -192,7 +196,7 @@ public function addMetas(array $metas)
      * @param  string        $name
      * @param  string|array  $content
      *
-     * @return \Arcanedev\SeoHelper\Entities\Twitter\Card
+     * @return $this
      */
     public function addMeta($name, $content)
     {
@@ -224,26 +228,10 @@ public function types()
      | -----------------------------------------------------------------
      */
 
-    /**
-     * Render card images.
-     */
-    private function loadImages()
-    {
-        if (count($this->images) == 1) {
-            $this->addMeta('image', $this->images[0]);
-
-            return;
-        }
-
-        foreach ($this->images as $number => $url) {
-            $this->addMeta("image{$number}", $url);
-        }
-    }
-
     /**
      * Reset the card.
      *
-     * @return \Arcanedev\SeoHelper\Entities\Twitter\Card
+     * @return $this
      */
     public function reset()
     {
@@ -319,6 +307,22 @@ private function checkSite(string &$site): void
      | -----------------------------------------------------------------
      */
 
+    /**
+     * Render card images.
+     */
+    private function loadImages(): void
+    {
+        if (count($this->images) == 1) {
+            $this->addMeta('image', $this->images[0]);
+
+            return;
+        }
+
+        foreach ($this->images as $number => $url) {
+            $this->addMeta("image{$number}", $url);
+        }
+    }
+
     /**
      * Prepare username.
      *
diff --git a/src/Entities/Twitter/MetaCollection.php b/src/Entities/Twitter/MetaCollection.php
index b9632b9..b1a42d3 100644
--- a/src/Entities/Twitter/MetaCollection.php
+++ b/src/Entities/Twitter/MetaCollection.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Entities\Twitter;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Entities\Twitter;
 
 use Arcanedev\SeoHelper\Bases\MetaCollection as BaseMetaCollection;
 
diff --git a/src/Entities/Webmasters.php b/src/Entities/Webmasters.php
index 2479161..74235b9 100644
--- a/src/Entities/Webmasters.php
+++ b/src/Entities/Webmasters.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Entities;
 
 use Arcanedev\SeoHelper\Contracts\Entities\Webmasters as WebmastersContract;
 use Arcanedev\Support\Traits\Configurable;
diff --git a/src/Exceptions/InvalidArgumentException.php b/src/Exceptions/InvalidArgumentException.php
index c1dee6c..af749a6 100644
--- a/src/Exceptions/InvalidArgumentException.php
+++ b/src/Exceptions/InvalidArgumentException.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Exceptions;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Exceptions;
 
 /**
  * Class     InvalidArgumentException
diff --git a/src/Exceptions/InvalidTwitterCardException.php b/src/Exceptions/InvalidTwitterCardException.php
index dc2339b..d745072 100644
--- a/src/Exceptions/InvalidTwitterCardException.php
+++ b/src/Exceptions/InvalidTwitterCardException.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Exceptions;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Exceptions;
 
 /**
  * Class     InvalidTwitterCardException
diff --git a/src/Exceptions/SeoHelperException.php b/src/Exceptions/SeoHelperException.php
index bb6b3a0..477b8f8 100644
--- a/src/Exceptions/SeoHelperException.php
+++ b/src/Exceptions/SeoHelperException.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Exceptions;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Exceptions;
 
 /**
  * Class     SeoHelperException
diff --git a/src/Helpers/Meta.php b/src/Helpers/Meta.php
index acb6b74..57d5880 100644
--- a/src/Helpers/Meta.php
+++ b/src/Helpers/Meta.php
@@ -89,7 +89,7 @@ public function key()
      *
      * @param  string  $prefix
      *
-     * @return \Arcanedev\SeoHelper\Helpers\Meta
+     * @return $this
      */
     public function setPrefix($prefix)
     {
@@ -103,7 +103,7 @@ public function setPrefix($prefix)
      *
      * @param  string  $nameProperty
      *
-     * @return \Arcanedev\SeoHelper\Helpers\Meta
+     * @return $this
      */
     public function setNameProperty($nameProperty)
     {
@@ -132,7 +132,7 @@ private function getName($prefixed = true)
      *
      * @param  string  $name
      *
-     * @return \Arcanedev\SeoHelper\Helpers\Meta
+     * @return $this
      */
     private function setName($name)
     {
@@ -159,7 +159,7 @@ private function getContent()
      *
      * @param  string|array  $content
      *
-     * @return \Arcanedev\SeoHelper\Helpers\Meta
+     * @return $this
      */
     private function setContent($content)
     {
@@ -172,9 +172,10 @@ private function setContent($content)
     }
 
     /* -----------------------------------------------------------------
-     |  Main Functions
+     |  Main Methods
      | -----------------------------------------------------------------
      */
+
     /**
      * Make Meta instance.
      *
@@ -183,7 +184,7 @@ private function setContent($content)
      * @param  string        $propertyName
      * @param  string        $prefix
      *
-     * @return \Arcanedev\SeoHelper\Helpers\Meta
+     * @return $this
      */
     public static function make($name, $content, $propertyName = 'name', $prefix = '')
     {
diff --git a/src/SeoHelper.php b/src/SeoHelper.php
index d50da67..2a4f509 100644
--- a/src/SeoHelper.php
+++ b/src/SeoHelper.php
@@ -1,9 +1,15 @@
-<?php namespace Arcanedev\SeoHelper;
+<?php
 
-use Arcanedev\SeoHelper\Contracts\SeoHelper as SeoHelperContract;
-use Arcanedev\SeoHelper\Contracts\SeoMeta as SeoMetaContract;
-use Arcanedev\SeoHelper\Contracts\SeoOpenGraph as SeoOpenGraphContract;
-use Arcanedev\SeoHelper\Contracts\SeoTwitter as SeoTwitterContract;
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper;
+
+use Arcanedev\SeoHelper\Contracts\{
+    SeoHelper as SeoHelperContract,
+    SeoMeta as SeoMetaContract,
+    SeoOpenGraph as SeoOpenGraphContract,
+    SeoTwitter as SeoTwitterContract
+};
 use Illuminate\Support\HtmlString;
 
 /**
@@ -53,9 +59,7 @@ class SeoHelper implements SeoHelperContract
      * @param  \Arcanedev\SeoHelper\Contracts\SeoTwitter    $seoTwitter
      */
     public function __construct(
-        SeoMetaContract      $seoMeta,
-        SeoOpenGraphContract $seoOpenGraph,
-        SeoTwitterContract   $seoTwitter
+        SeoMetaContract $seoMeta, SeoOpenGraphContract $seoOpenGraph, SeoTwitterContract $seoTwitter
     ) {
         $this->setSeoMeta($seoMeta);
         $this->setSeoOpenGraph($seoOpenGraph);
@@ -82,7 +86,7 @@ public function meta()
      *
      * @param  \Arcanedev\SeoHelper\Contracts\SeoMeta  $seoMeta
      *
-     * @return \Arcanedev\SeoHelper\SeoHelper
+     * @return $this
      */
     public function setSeoMeta(SeoMetaContract $seoMeta)
     {
@@ -118,7 +122,7 @@ public function og()
      *
      * @param  \Arcanedev\SeoHelper\Contracts\SeoOpenGraph  $seoOpenGraph
      *
-     * @return \Arcanedev\SeoHelper\SeoHelper
+     * @return $this
      */
     public function setSeoOpenGraph(SeoOpenGraphContract $seoOpenGraph)
     {
@@ -142,7 +146,7 @@ public function twitter()
      *
      * @param  \Arcanedev\SeoHelper\Contracts\SeoTwitter  $seoTwitter
      *
-     * @return \Arcanedev\SeoHelper\SeoHelper
+     * @return $this
      */
     public function setSeoTwitter(SeoTwitterContract $seoTwitter)
     {
@@ -158,7 +162,7 @@ public function setSeoTwitter(SeoTwitterContract $seoTwitter)
      * @param  string|null  $siteName
      * @param  string|null  $separator
      *
-     * @return \Arcanedev\SeoHelper\SeoHelper
+     * @return $this
      */
     public function setTitle($title, $siteName = null, $separator = null)
     {
@@ -229,7 +233,7 @@ public function setDescription($description)
      *
      * @param  array|string  $keywords
      *
-     * @return \Arcanedev\SeoHelper\SeoHelper
+     * @return $this
      */
     public function setKeywords($keywords)
     {
@@ -243,7 +247,7 @@ public function setKeywords($keywords)
      *
      * @param  string  $imageUrl
      *
-     * @return \Arcanedev\SeoHelper\SeoHelper
+     * @return $this
      */
     public function setImage($imageUrl)
     {
@@ -255,10 +259,10 @@ public function setImage($imageUrl)
 
     /**
      * Set the current URL.
-     * 
+     *
      * @param  string  $url
      *
-     * @return \Arcanedev\SeoHelper\SeoHelper
+     * @return $this
      */
     public function setUrl($url)
     {
@@ -312,7 +316,7 @@ public function __toString()
     /**
      * Enable the OpenGraph.
      *
-     * @return \Arcanedev\SeoHelper\SeoHelper
+     * @return $this
      */
     public function enableOpenGraph()
     {
@@ -324,7 +328,7 @@ public function enableOpenGraph()
     /**
      * Disable the OpenGraph.
      *
-     * @return \Arcanedev\SeoHelper\SeoHelper
+     * @return $this
      */
     public function disableOpenGraph()
     {
@@ -336,7 +340,7 @@ public function disableOpenGraph()
     /**
      * Enable the Twitter Card.
      *
-     * @return \Arcanedev\SeoHelper\SeoHelper
+     * @return $this
      */
     public function enableTwitter()
     {
@@ -348,7 +352,7 @@ public function enableTwitter()
     /**
      * Disable the Twitter Card.
      *
-     * @return \Arcanedev\SeoHelper\SeoHelper
+     * @return $this
      */
     public function disableTwitter()
     {
diff --git a/src/SeoHelperServiceProvider.php b/src/SeoHelperServiceProvider.php
index 0083d4d..eb7cdc3 100644
--- a/src/SeoHelperServiceProvider.php
+++ b/src/SeoHelperServiceProvider.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper;
 
 use Arcanedev\Support\Providers\PackageServiceProvider as ServiceProvider;
 use Illuminate\Contracts\Support\DeferrableProvider;
diff --git a/src/SeoMeta.php b/src/SeoMeta.php
index 86f4e7b..aea4c69 100644
--- a/src/SeoMeta.php
+++ b/src/SeoMeta.php
@@ -1,11 +1,17 @@
-<?php namespace Arcanedev\SeoHelper;
-
-use Arcanedev\SeoHelper\Contracts\Entities\Analytics as AnalyticsContract;
-use Arcanedev\SeoHelper\Contracts\Entities\Description as DescriptionContract;
-use Arcanedev\SeoHelper\Contracts\Entities\Keywords as KeywordsContract;
-use Arcanedev\SeoHelper\Contracts\Entities\MiscTags as MiscTagsContract;
-use Arcanedev\SeoHelper\Contracts\Entities\Title as TitleContract;
-use Arcanedev\SeoHelper\Contracts\Entities\Webmasters as WebmastersContract;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper;
+
+use Arcanedev\SeoHelper\Contracts\Entities\{
+    Analytics as AnalyticsContract,
+    Description as DescriptionContract,
+    Keywords as KeywordsContract,
+    MiscTags as MiscTagsContract,
+    Title as TitleContract,
+    Webmasters as WebmastersContract
+};
 use Arcanedev\SeoHelper\Contracts\SeoMeta as SeoMetaContract;
 use Arcanedev\Support\Traits\Configurable;
 
@@ -97,7 +103,7 @@ public function __construct(array $configs)
     /**
      * Start the engine.
      */
-    private function init()
+    private function init(): void
     {
         $this->title(
             new Entities\Title($this->getConfig('title', []))
@@ -289,7 +295,7 @@ public function setTitle($title, $siteName = null, $separator = null)
      *
      * @param  string  $siteName
      *
-     * @return self
+     * @return $this
      */
     public function setSiteName($siteName)
     {
@@ -313,7 +319,7 @@ public function hideSiteName()
     /**
      * Show site name.
      *
-     * @return self
+     * @return $this
      */
     public function showSiteName()
     {
diff --git a/src/SeoOpenGraph.php b/src/SeoOpenGraph.php
index 5fadb71..7059444 100644
--- a/src/SeoOpenGraph.php
+++ b/src/SeoOpenGraph.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper;
 
 use Arcanedev\SeoHelper\Contracts\Entities\OpenGraph as OpenGraphContract;
 use Arcanedev\SeoHelper\Contracts\SeoOpenGraph as SeoOpenGraphContract;
@@ -63,20 +67,6 @@ public function __construct(array $configs)
      | -----------------------------------------------------------------
      */
 
-    /**
-     * Set the enabled status for the OpenGraph.
-     *
-     * @param  bool  $enabled
-     *
-     * @return \Arcanedev\SeoHelper\SeoOpenGraph
-     */
-    private function setEnabled($enabled)
-    {
-        $this->enabled = $enabled;
-
-        return $this;
-    }
-
     /**
      * Set the Open Graph instance.
      *
@@ -246,6 +236,20 @@ public function addProperty($property, $content)
         return $this;
     }
 
+    /**
+     * Set the enabled status for the OpenGraph.
+     *
+     * @param  bool  $enabled
+     *
+     * @return \Arcanedev\SeoHelper\SeoOpenGraph
+     */
+    private function setEnabled(bool $enabled)
+    {
+        $this->enabled = $enabled;
+
+        return $this;
+    }
+
     /* -----------------------------------------------------------------
      |  Main Methods
      | -----------------------------------------------------------------
diff --git a/src/SeoTwitter.php b/src/SeoTwitter.php
index 3140074..4d3482c 100644
--- a/src/SeoTwitter.php
+++ b/src/SeoTwitter.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper;
 
 use Arcanedev\SeoHelper\Contracts\Entities\TwitterCard as CardContract;
 use Arcanedev\SeoHelper\Contracts\SeoTwitter as SeoTwitterContract;
@@ -65,26 +69,12 @@ public function __construct(array $configs)
      | -----------------------------------------------------------------
      */
 
-    /**
-     * Set the enabled status for the Twitter Card.
-     *
-     * @param  bool  $enabled
-     *
-     * @return \Arcanedev\SeoHelper\SeoTwitter
-     */
-    private function setEnabled($enabled)
-    {
-        $this->enabled = (bool) $enabled;
-
-        return $this;
-    }
-
     /**
      * Set the Twitter Card instance.
      *
      * @param  \Arcanedev\SeoHelper\Contracts\Entities\TwitterCard  $card
      *
-     * @return \Arcanedev\SeoHelper\SeoTwitter
+     * @return $this
      */
     public function setCard(CardContract $card)
     {
@@ -98,7 +88,7 @@ public function setCard(CardContract $card)
      *
      * @param  string  $type
      *
-     * @return \Arcanedev\SeoHelper\SeoTwitter
+     * @return $this
      */
     public function setType($type)
     {
@@ -112,7 +102,7 @@ public function setType($type)
      *
      * @param  string  $site
      *
-     * @return \Arcanedev\SeoHelper\SeoTwitter
+     * @return $this
      */
     public function setSite($site)
     {
@@ -126,7 +116,7 @@ public function setSite($site)
      *
      * @param  string  $title
      *
-     * @return \Arcanedev\SeoHelper\SeoTwitter
+     * @return $this
      */
     public function setTitle($title)
     {
@@ -140,7 +130,7 @@ public function setTitle($title)
      *
      * @param  string  $description
      *
-     * @return \Arcanedev\SeoHelper\SeoTwitter
+     * @return $this
      */
     public function setDescription($description)
     {
@@ -154,7 +144,7 @@ public function setDescription($description)
      *
      * @param  string  $url
      *
-     * @return \Arcanedev\SeoHelper\SeoTwitter
+     * @return $this
      */
     public function addImage($url)
     {
@@ -168,7 +158,7 @@ public function addImage($url)
      *
      * @param  array  $metas
      *
-     * @return \Arcanedev\SeoHelper\SeoTwitter
+     * @return $this
      */
     public function addMetas(array $metas)
     {
@@ -183,7 +173,7 @@ public function addMetas(array $metas)
      * @param  string  $name
      * @param  string  $content
      *
-     * @return \Arcanedev\SeoHelper\SeoTwitter
+     * @return $this
      */
     public function addMeta($name, $content)
     {
@@ -192,6 +182,20 @@ public function addMeta($name, $content)
         return $this;
     }
 
+    /**
+     * Set the enabled status for the Twitter Card.
+     *
+     * @param  bool  $enabled
+     *
+     * @return $this
+     */
+    private function setEnabled(bool $enabled)
+    {
+        $this->enabled = $enabled;
+
+        return $this;
+    }
+
     /* -----------------------------------------------------------------
      |  Main Methods
      | -----------------------------------------------------------------
@@ -200,7 +204,7 @@ public function addMeta($name, $content)
     /**
      * Reset the Twitter Card.
      *
-     * @return \Arcanedev\SeoHelper\SeoTwitter
+     * @return $this
      */
     public function reset()
     {
@@ -232,7 +236,7 @@ public function __toString()
     /**
      * Enable the Twitter Card.
      *
-     * @return \Arcanedev\SeoHelper\SeoTwitter
+     * @return $this
      */
     public function enable()
     {
@@ -242,7 +246,7 @@ public function enable()
     /**
      * Disable the Twitter Card.
      *
-     * @return \Arcanedev\SeoHelper\SeoTwitter
+     * @return $this
      */
     public function disable()
     {
diff --git a/src/Traits/Seoable.php b/src/Traits/Seoable.php
index a4d54fb..a86d6df 100644
--- a/src/Traits/Seoable.php
+++ b/src/Traits/Seoable.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Traits;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Traits;
 
 /**
  * Trait     Seoable
diff --git a/tests/Asserts/AssertsHtmlStrings.php b/tests/Asserts/AssertsHtmlStrings.php
index 10fa884..fa0a871 100644
--- a/tests/Asserts/AssertsHtmlStrings.php
+++ b/tests/Asserts/AssertsHtmlStrings.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Tests\Asserts;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests\Asserts;
 
 use DOMDocument;
 
@@ -18,15 +22,15 @@ trait AssertsHtmlStrings
     /**
      * Assert two Html strings are equals.
      *
-     * @param  string  $expected
-     * @param  string  $actual
-     * @param  string  $message
+     * @param  string        $expected
+     * @param  string|mixed  $actual
+     * @param  string        $message
      */
-    public static function assertHtmlStringEqualsHtmlString(string $expected, string $actual, string $message = '')
+    public static function assertHtmlStringEqualsHtmlString(string $expected, $actual, string $message = ''): void
     {
         static::assertEqualsCanonicalizing(
             static::convertToDomDocument($expected),
-            static::convertToDomDocument($actual),
+            static::convertToDomDocument((string) $actual),
             $message
         );
     }
@@ -43,7 +47,7 @@ public static function assertHtmlStringEqualsHtmlString(string $expected, string
      *
      * @return \DOMDocument
      */
-    protected static function convertToDomDocument($html)
+    protected static function convertToDomDocument($html): DOMDocument
     {
         return tap(new DOMDocument, function (DOMDocument $dom) use ($html) {
             $dom->loadHTML(preg_replace('/>\s+</', '><', $html));
diff --git a/tests/Entities/AnalyticsTest.php b/tests/Entities/AnalyticsTest.php
index f79eed8..a214dd6 100644
--- a/tests/Entities/AnalyticsTest.php
+++ b/tests/Entities/AnalyticsTest.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Tests\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests\Entities;
 
 use Arcanedev\SeoHelper\Entities\Analytics;
 use Arcanedev\SeoHelper\Tests\TestCase;
@@ -45,7 +49,7 @@ public function tearDown(): void
      */
 
     /** @test */
-    public function it_can_be_instantiated()
+    public function it_can_be_instantiated(): void
     {
         $expectations = [
             \Arcanedev\SeoHelper\Contracts\Renderable::class,
@@ -59,7 +63,7 @@ public function it_can_be_instantiated()
     }
 
     /** @test */
-    public function it_must_render_empty_on_init()
+    public function it_must_render_empty_on_init(): void
     {
         $this->analytics = new Analytics;
 
@@ -67,7 +71,7 @@ public function it_must_render_empty_on_init()
     }
 
     /** @test */
-    public function it_can_render()
+    public function it_can_render(): void
     {
         $expectations = [
             '<script>',
diff --git a/tests/Entities/DescriptionTest.php b/tests/Entities/DescriptionTest.php
index cf89259..4c4dd23 100644
--- a/tests/Entities/DescriptionTest.php
+++ b/tests/Entities/DescriptionTest.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Tests\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests\Entities;
 
 use Arcanedev\SeoHelper\Entities\Description;
 use Arcanedev\SeoHelper\Tests\TestCase;
@@ -46,7 +50,7 @@ public function tearDown(): void
      */
 
     /** @test */
-    public function it_can_be_instantiated()
+    public function it_can_be_instantiated(): void
     {
         $expectations = [
             \Arcanedev\SeoHelper\Entities\Description::class,
@@ -60,7 +64,7 @@ public function it_can_be_instantiated()
     }
 
     /** @test */
-    public function it_can_make()
+    public function it_can_make(): void
     {
         $this->description = Description::make('Cool description about this package');
 
@@ -76,7 +80,7 @@ public function it_can_make()
     }
 
     /** @test */
-    public function it_can_get_default_description()
+    public function it_can_get_default_description(): void
     {
         $content = $this->getDefaultContent();
 
@@ -84,7 +88,7 @@ public function it_can_get_default_description()
     }
 
     /** @test */
-    public function it_can_set_and_get_content()
+    public function it_can_set_and_get_content(): void
     {
         $content = 'Cool description about this package';
 
@@ -94,7 +98,7 @@ public function it_can_set_and_get_content()
     }
 
     /** @test */
-    public function it_can_set_and_get_max_length()
+    public function it_can_set_and_get_max_length(): void
     {
         $max = 150;
 
@@ -104,7 +108,7 @@ public function it_can_set_and_get_max_length()
     }
 
     /** @test */
-    public function it_must_throw_invalid_max_length_type()
+    public function it_must_throw_invalid_max_length_type(): void
     {
         $this->expectException(\Arcanedev\SeoHelper\Exceptions\InvalidArgumentException::class);
         $this->expectExceptionMessage('The description maximum length must be integer.');
@@ -113,7 +117,7 @@ public function it_must_throw_invalid_max_length_type()
     }
 
     /** @test */
-    public function it_must_throw_invalid_max_length_value()
+    public function it_must_throw_invalid_max_length_value(): void
     {
         $this->expectException(\Arcanedev\SeoHelper\Exceptions\InvalidArgumentException::class);
         $this->expectExceptionMessage('The description maximum length must be greater 0.');
@@ -122,7 +126,7 @@ public function it_must_throw_invalid_max_length_value()
     }
 
     /** @test */
-    public function it_can_render()
+    public function it_can_render(): void
     {
         $this->description->set(
             $description = 'Cool description about this package'
@@ -135,7 +139,7 @@ public function it_can_render()
     }
 
     /** @test */
-    public function it_can_render_empty_description()
+    public function it_can_render_empty_description(): void
     {
         $this->description->set('');
 
@@ -144,7 +148,7 @@ public function it_can_render_empty_description()
     }
 
     /** @test */
-    public function it_can_render_long_title()
+    public function it_can_render_long_title(): void
     {
         $content = 'Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, ullamco laboris aliquip commodo.';
         $max     = $this->getDefaultMax();
@@ -167,7 +171,7 @@ public function it_can_render_long_title()
      *
      * @return array
      */
-    private function getDescriptionConfig()
+    private function getDescriptionConfig(): array
     {
         return $this->getSeoHelperConfig('description', []);
     }
@@ -179,7 +183,7 @@ private function getDescriptionConfig()
      *
      * @return string
      */
-    private function getDefaultContent($default = '')
+    private function getDefaultContent($default = ''): string
     {
         return $this->getSeoHelperConfig('description.default', $default);
     }
@@ -191,7 +195,7 @@ private function getDefaultContent($default = '')
      *
      * @return int
      */
-    private function getDefaultMax($default = 155)
+    private function getDefaultMax($default = 155): int
     {
         return $this->getSeoHelperConfig('description.max', $default);
     }
diff --git a/tests/Entities/KeywordsTest.php b/tests/Entities/KeywordsTest.php
index 16395aa..75b36df 100644
--- a/tests/Entities/KeywordsTest.php
+++ b/tests/Entities/KeywordsTest.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Tests\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests\Entities;
 
 use Arcanedev\SeoHelper\Entities\Keywords;
 use Arcanedev\SeoHelper\Tests\TestCase;
@@ -45,7 +49,7 @@ public function tearDown(): void
      */
 
     /** @test */
-    public function it_can_be_instantiated()
+    public function it_can_be_instantiated(): void
     {
         $expectations = [
             \Arcanedev\SeoHelper\Contracts\Renderable::class,
@@ -59,7 +63,7 @@ public function it_can_be_instantiated()
     }
 
     /** @test */
-    public function it_can_get_default_content()
+    public function it_can_get_default_content(): void
     {
         $content = $this->getDefaultContent();
 
@@ -68,7 +72,7 @@ public function it_can_get_default_content()
     }
 
     /** @test */
-    public function it_can_set_and_get_content()
+    public function it_can_set_and_get_content(): void
     {
         $content = $this->getDefaultContent();
 
@@ -95,7 +99,7 @@ public function it_can_set_and_get_content()
     }
 
     /** @test */
-    public function it_can_add_a_keyword()
+    public function it_can_add_a_keyword(): void
     {
         $content = $this->getDefaultContent();
 
@@ -112,7 +116,7 @@ public function it_can_add_a_keyword()
     }
 
     /** @test */
-    public function it_can_add_many_keywords()
+    public function it_can_add_many_keywords(): void
     {
         $content = $this->getDefaultContent();
 
@@ -131,7 +135,7 @@ public function it_can_add_many_keywords()
     }
 
     /** @test */
-    public function it_can_render()
+    public function it_can_render(): void
     {
         $content  = $this->getDefaultContent();
         $expected = '<meta name="keywords" content="'.implode(', ', $content).'">';
@@ -166,7 +170,7 @@ public function it_can_render()
     }
 
     /** @test */
-    public function it_can_make()
+    public function it_can_make(): void
     {
         $keywords       = $this->getDefaultContent();
         $this->keywords = Keywords::make($keywords);
@@ -189,7 +193,7 @@ public function it_can_make()
      *
      * @return array
      */
-    private function getKeywordsConfig()
+    private function getKeywordsConfig(): array
     {
         return $this->getSeoHelperConfig('keywords', []);
     }
diff --git a/tests/Entities/MetaCollectionTest.php b/tests/Entities/MetaCollectionTest.php
index 091136b..f70c5c9 100644
--- a/tests/Entities/MetaCollectionTest.php
+++ b/tests/Entities/MetaCollectionTest.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Tests\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests\Entities;
 
 use Arcanedev\SeoHelper\Entities\MetaCollection;
 use Arcanedev\SeoHelper\Tests\TestCase;
@@ -44,7 +48,7 @@ public function tearDown(): void
      */
 
     /** @test */
-    public function it_can_be_instantiated()
+    public function it_can_be_instantiated(): void
     {
         $expectations = [
             \Arcanedev\SeoHelper\Entities\MetaCollection::class,
@@ -60,7 +64,7 @@ public function it_can_be_instantiated()
     }
 
     /** @test */
-    public function it_can_add_meta()
+    public function it_can_add_meta(): void
     {
         $this->metas->addOne('robots', 'noindex, nofollow');
 
@@ -72,7 +76,7 @@ public function it_can_add_meta()
     }
 
     /** @test */
-    public function it_can_render_meta_tags()
+    public function it_can_render_meta_tags(): void
     {
         $this->metas->addOne('robots', 'noindex, nofollow');
 
@@ -83,7 +87,7 @@ public function it_can_render_meta_tags()
     }
 
     /** @test */
-    public function it_can_render_link_tags()
+    public function it_can_render_link_tags(): void
     {
         $this->metas->addOne('canonical', $this->baseUrl);
 
diff --git a/tests/Entities/MiscTagsTest.php b/tests/Entities/MiscTagsTest.php
index b719772..eb96dbb 100644
--- a/tests/Entities/MiscTagsTest.php
+++ b/tests/Entities/MiscTagsTest.php
@@ -1,6 +1,9 @@
-<?php namespace Arcanedev\SeoHelper\Tests\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests\Entities;
 
-use Arcanedev\SeoHelper\Contracts\Renderable;
 use Arcanedev\SeoHelper\Entities\MiscTags;
 use Arcanedev\SeoHelper\Tests\TestCase;
 
@@ -48,7 +51,7 @@ public function tearDown(): void
      */
 
     /** @test */
-    public function it_can_be_instantiated()
+    public function it_can_be_instantiated(): void
     {
         $expectations = [
             \Arcanedev\SeoHelper\Contracts\Entities\MiscTags::class,
@@ -62,7 +65,7 @@ public function it_can_be_instantiated()
     }
 
     /** @test */
-    public function it_can_render_canonical()
+    public function it_can_render_canonical(): void
     {
         $this->misc->setUrl($url = 'http://laravel.com');
 
@@ -78,7 +81,7 @@ public function it_can_render_canonical()
     }
 
     /** @test */
-    public function it_can_render_robots()
+    public function it_can_render_robots(): void
     {
         $expected = '<meta name="robots" content="noindex, nofollow">';
 
@@ -92,7 +95,7 @@ public function it_can_render_robots()
     }
 
     /** @test */
-    public function it_can_render_links()
+    public function it_can_render_links(): void
     {
         $author    = 'https://plus.google.com/+AuthorProfile';
         $publisher = 'https://plus.google.com/+PublisherProfile';
@@ -113,7 +116,7 @@ public function it_can_render_links()
     }
 
     /** @test */
-    public function it_can_render()
+    public function it_can_render(): void
     {
         $robots    = '<meta name="robots" content="noindex, nofollow">';
         $canonical = '<link rel="canonical" href="'.$this->baseUrl.'">';
@@ -150,7 +153,7 @@ public function it_can_render()
     }
 
     /** @test */
-    public function it_can_add_remove_and_reset_tags()
+    public function it_can_add_remove_and_reset_tags(): void
     {
         static::assertNotEmpty($this->misc->render());
 
@@ -215,7 +218,7 @@ public function it_can_add_remove_and_reset_tags()
     }
 
     /** @test */
-    public function it_can_make()
+    public function it_can_make(): void
     {
         $this->misc = MiscTags::make([
             'copyright'       => 'ARCANEDEV',
@@ -251,7 +254,7 @@ public function it_can_make()
      *
      * @return array
      */
-    private function getMiscConfig()
+    private function getMiscConfig(): array
     {
         return $this->getSeoHelperConfig('misc', []);
     }
diff --git a/tests/Entities/OpenGraph/GraphTest.php b/tests/Entities/OpenGraph/GraphTest.php
index 3b7784a..a4dbf62 100644
--- a/tests/Entities/OpenGraph/GraphTest.php
+++ b/tests/Entities/OpenGraph/GraphTest.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Tests\Entities\OpenGraph;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests\Entities\OpenGraph;
 
 use Arcanedev\SeoHelper\Entities\OpenGraph\Graph;
 use Arcanedev\SeoHelper\Tests\TestCase;
@@ -45,7 +49,7 @@ public function tearDown(): void
      */
 
     /** @test */
-    public function it_can_be_instantiated()
+    public function it_can_be_instantiated(): void
     {
         $expectations = [
             \Arcanedev\SeoHelper\Entities\OpenGraph\Graph::class,
@@ -59,7 +63,7 @@ public function it_can_be_instantiated()
     }
 
     /** @test */
-    public function it_can_render_defaults()
+    public function it_can_render_defaults(): void
     {
         $output   = $this->og->render();
         $expected = '<meta property="og:type" content="website">'.
@@ -70,7 +74,7 @@ public function it_can_render_defaults()
     }
 
     /** @test */
-    public function it_can_set_and_render_type()
+    public function it_can_set_and_render_type(): void
     {
         $types = [
             'article',
@@ -90,7 +94,7 @@ public function it_can_set_and_render_type()
     }
 
     /** @test */
-    public function it_can_set_and_render_title()
+    public function it_can_set_and_render_title(): void
     {
         $title = 'Hello World';
 
@@ -103,7 +107,7 @@ public function it_can_set_and_render_title()
     }
 
     /** @test */
-    public function it_can_set_and_render_description()
+    public function it_can_set_and_render_description(): void
     {
         $description = 'Hello World detailed description.';
 
@@ -116,7 +120,7 @@ public function it_can_set_and_render_description()
     }
 
     /** @test */
-    public function it_can_set_and_render_url()
+    public function it_can_set_and_render_url(): void
     {
         $url = 'http://www.imdb.com/title/tt0080339/';
 
@@ -129,7 +133,7 @@ public function it_can_set_and_render_url()
     }
 
     /** @test */
-    public function it_can_set_and_render_image()
+    public function it_can_set_and_render_image(): void
     {
         $image = 'http://ia.media-imdb.com/images/M/MV5BNDU2MjE4MTcwNl5BMl5BanBnXkFtZTgwNDExOTMxMDE@._V1_UY1200_CR90,0,630,1200_AL_.jpg';
 
@@ -142,7 +146,7 @@ public function it_can_set_and_render_image()
     }
 
     /** @test */
-    public function it_can_set_and_render_site_name()
+    public function it_can_set_and_render_site_name(): void
     {
         $siteName = 'My site name';
 
@@ -155,7 +159,7 @@ public function it_can_set_and_render_site_name()
     }
 
     /** @test */
-    public function it_can_add_render_property()
+    public function it_can_add_render_property(): void
     {
         $locale = 'en_GB';
 
@@ -168,7 +172,7 @@ public function it_can_add_render_property()
     }
 
     /** @test */
-    public function it_can_add_render_properties()
+    public function it_can_add_render_properties(): void
     {
         $properties = [
             'locale'           => 'en_GB',
@@ -190,7 +194,7 @@ public function it_can_add_render_properties()
     }
 
     /** @test */
-    public function it_can_set_and_render_locale_property()
+    public function it_can_set_and_render_locale_property(): void
     {
         $locales = ['fr_FR', 'en_GB', 'es_ES'];
 
@@ -203,7 +207,7 @@ public function it_can_set_and_render_locale_property()
     }
 
     /** @test */
-    public function it_can_set_and_render_alternative_properties()
+    public function it_can_set_and_render_alternative_properties(): void
     {
         $this->og->setAlternativeLocales(['fr_FR', 'en_GB', 'es_ES']);
 
diff --git a/tests/Entities/TitleTest.php b/tests/Entities/TitleTest.php
index 8ee85e4..7884935 100644
--- a/tests/Entities/TitleTest.php
+++ b/tests/Entities/TitleTest.php
@@ -1,6 +1,11 @@
-<?php namespace Arcanedev\SeoHelper\Tests\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests\Entities;
 
 use Arcanedev\SeoHelper\Entities\Title;
+use Arcanedev\SeoHelper\Exceptions\InvalidArgumentException;
 use Arcanedev\SeoHelper\Tests\TestCase;
 use Illuminate\Support\Arr;
 use Illuminate\Support\Str;
@@ -47,7 +52,7 @@ public function tearDown(): void
      */
 
     /** @test */
-    public function it_can_be_instantiated()
+    public function it_can_be_instantiated(): void
     {
         $expectations = [
             \Arcanedev\SeoHelper\Contracts\Renderable::class,
@@ -61,7 +66,7 @@ public function it_can_be_instantiated()
     }
 
     /** @test */
-    public function it_can_get_default_title()
+    public function it_can_get_default_title(): void
     {
         static::assertSame(
             $this->getDefaultTitle(),
@@ -70,7 +75,7 @@ public function it_can_get_default_title()
     }
 
     /** @test */
-    public function it_can_set_and_get_title()
+    public function it_can_set_and_get_title(): void
     {
         $title = 'Awesome Title';
 
@@ -80,7 +85,7 @@ public function it_can_set_and_get_title()
     }
 
     /** @test */
-    public function it_can_get_default_site_name()
+    public function it_can_get_default_site_name(): void
     {
         static::assertSame(
             $this->getDefaultSiteName(),
@@ -89,7 +94,7 @@ public function it_can_get_default_site_name()
     }
 
     /** @test */
-    public function it_can_set_and_get_site_name()
+    public function it_can_set_and_get_site_name(): void
     {
         $siteName = 'Company name';
 
@@ -99,7 +104,7 @@ public function it_can_set_and_get_site_name()
     }
 
     /** @test */
-    public function it_can_get_default_separator()
+    public function it_can_get_default_separator(): void
     {
         static::assertSame(
             $this->getDefaultSeparator(),
@@ -108,7 +113,7 @@ public function it_can_get_default_separator()
     }
 
     /** @test */
-    public function it_can_get_and_set_separator()
+    public function it_can_get_and_set_separator(): void
     {
         $separator = '|';
         $this->title->setSeparator($separator);
@@ -122,7 +127,7 @@ public function it_can_get_and_set_separator()
     }
 
     /** @test */
-    public function it_can_get_default_title_position()
+    public function it_can_get_default_title_position(): void
     {
         static::assertSame(
             Arr::get($this->getTitleConfig(), 'first', true),
@@ -131,7 +136,7 @@ public function it_can_get_default_title_position()
     }
 
     /** @test */
-    public function it_can_switch_title_position()
+    public function it_can_switch_title_position(): void
     {
         static::assertTrue($this->title->isTitleFirst());
 
@@ -145,7 +150,7 @@ public function it_can_switch_title_position()
     }
 
     /** @test */
-    public function it_can_render_default_title()
+    public function it_can_render_default_title(): void
     {
         $title    = $this->getDefaultTitle();
         $siteName = $this->getDefaultSiteName();
@@ -156,7 +161,7 @@ public function it_can_render_default_title()
     }
 
     /** @test */
-    public function it_can_render_custom_titles()
+    public function it_can_render_custom_titles(): void
     {
         $title     = 'Awesome Title';
         $siteName  = 'Company name';
@@ -221,7 +226,7 @@ public function it_can_render_custom_titles()
     }
 
     /** @test */
-    public function it_can_make_title_tag()
+    public function it_can_make_title_tag(): void
     {
         $title     = 'Awesome title';
         $siteName  = 'Company Name';
@@ -242,7 +247,7 @@ public function it_can_make_title_tag()
     }
 
     /** @test */
-    public function it_can_toggle_site_name_visibility()
+    public function it_can_toggle_site_name_visibility(): void
     {
         $title     = 'Awesome title';
         $siteName  = 'Company Name';
@@ -271,25 +276,25 @@ public function it_can_toggle_site_name_visibility()
     }
 
     /** @test */
-    public function it_must_throw_title_exception_on_invalid_type()
+    public function it_must_throw_title_exception_on_invalid_type(): void
     {
-        $this->expectException(\Arcanedev\SeoHelper\Exceptions\InvalidArgumentException::class);
+        $this->expectException(InvalidArgumentException::class);
         $this->expectExceptionMessage('The title must be a string value, [NULL] is given.');
 
         $this->title->set(null);
     }
 
     /** @test */
-    public function it_must_throw_title_exception_on_empty_title()
+    public function it_must_throw_title_exception_on_empty_title(): void
     {
-        $this->expectException(\Arcanedev\SeoHelper\Exceptions\InvalidArgumentException::class);
+        $this->expectException(InvalidArgumentException::class);
         $this->expectExceptionMessage('The title is required and must not be empty.');
 
         $this->title->set('  ');
     }
 
     /** @test */
-    public function it_can_set_and_get_max_length()
+    public function it_can_set_and_get_max_length(): void
     {
         $this->title->setMax($max = 50);
 
@@ -297,7 +302,7 @@ public function it_can_set_and_get_max_length()
     }
 
     /** @test */
-    public function it_can_render_long_title()
+    public function it_can_render_long_title(): void
     {
         $title = 'This is my long and awesome title that gonna blown your mind.';
         $max   = $this->getDefaultMax();
@@ -311,7 +316,7 @@ public function it_can_render_long_title()
     }
 
     /** @test */
-    public function it_can_render_title_with_accents()
+    public function it_can_render_title_with_accents(): void
     {
         $this->title->set('Ce package est intuitif, exceptionnel et bien sûr opérationnel');
 
@@ -322,18 +327,18 @@ public function it_can_render_title_with_accents()
     }
 
     /** @test */
-    public function it_must_throw_invalid_max_length_type()
+    public function it_must_throw_invalid_max_length_type(): void
     {
-        $this->expectException(\Arcanedev\SeoHelper\Exceptions\InvalidArgumentException::class);
+        $this->expectException(InvalidArgumentException::class);
         $this->expectExceptionMessage('The title maximum length must be integer.');
 
         $this->title->setMax(null);
     }
 
     /** @test */
-    public function it_must_throw_invalid_max_length_value()
+    public function it_must_throw_invalid_max_length_value(): void
     {
-        $this->expectException(\Arcanedev\SeoHelper\Exceptions\InvalidArgumentException::class);
+        $this->expectException(InvalidArgumentException::class);
         $this->expectExceptionMessage('The title maximum length must be greater 0.');
 
         $this->title->setMax(0);
@@ -349,7 +354,7 @@ public function it_must_throw_invalid_max_length_value()
      *
      * @return array
      */
-    private function getTitleConfig()
+    private function getTitleConfig(): array
     {
         return $this->getSeoHelperConfig('title', []);
     }
@@ -361,7 +366,7 @@ private function getTitleConfig()
      *
      * @return string
      */
-    private function getDefaultTitle($default = '')
+    private function getDefaultTitle($default = ''): string
     {
         return $this->getSeoHelperConfig('title.default', $default);
     }
@@ -373,7 +378,7 @@ private function getDefaultTitle($default = '')
      *
      * @return string
      */
-    private function getDefaultSiteName($default = '')
+    private function getDefaultSiteName($default = ''): string
     {
         return $this->getSeoHelperConfig('title.site-name', $default);
     }
@@ -385,7 +390,7 @@ private function getDefaultSiteName($default = '')
      *
      * @return string
      */
-    private function getDefaultSeparator($default = '-')
+    private function getDefaultSeparator($default = '-'): string
     {
         return $this->getSeoHelperConfig('title.separator', $default);
     }
@@ -397,7 +402,7 @@ private function getDefaultSeparator($default = '-')
      *
      * @return int
      */
-    private function getDefaultMax($default = 55)
+    private function getDefaultMax($default = 55): int
     {
         return $this->getSeoHelperConfig('title.max', $default);
     }
diff --git a/tests/Entities/Twitter/CardTest.php b/tests/Entities/Twitter/CardTest.php
index b7fd2dc..5fdb397 100644
--- a/tests/Entities/Twitter/CardTest.php
+++ b/tests/Entities/Twitter/CardTest.php
@@ -1,6 +1,11 @@
-<?php namespace Arcanedev\SeoHelper\Tests\Entities\Twitter;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests\Entities\Twitter;
 
 use Arcanedev\SeoHelper\Entities\Twitter\Card;
+use Arcanedev\SeoHelper\Exceptions\InvalidTwitterCardException;
 use Arcanedev\SeoHelper\Tests\TestCase;
 
 /**
@@ -45,7 +50,7 @@ public function tearDown(): void
      */
 
     /** @test */
-    public function it_can_be_instantiated()
+    public function it_can_be_instantiated(): void
     {
         $expectations = [
             \Arcanedev\SeoHelper\Contracts\Renderable::class,
@@ -59,7 +64,7 @@ public function it_can_be_instantiated()
     }
 
     /** @test */
-    public function it_can_set_type_and_render()
+    public function it_can_set_type_and_render(): void
     {
         $supported = [
             'app', 'gallery', 'photo', 'player', 'product', 'summary', 'summary_large_image'
@@ -76,25 +81,25 @@ public function it_can_set_type_and_render()
     }
 
     /** @test */
-    public function it_must_throw_invalid_twitter_card_exception_on_invalid_type()
+    public function it_must_throw_invalid_twitter_card_exception_on_invalid_type(): void
     {
-        $this->expectException(\Arcanedev\SeoHelper\Exceptions\InvalidTwitterCardException::class);
+        $this->expectException(InvalidTwitterCardException::class);
         $this->expectExceptionMessage('The Twitter card type must be a string value, [boolean] was given.');
 
         $this->card->setType(true);
     }
 
     /** @test */
-    public function it_must_throw_invalid_twitter_card_exception_on_unsupported_type()
+    public function it_must_throw_invalid_twitter_card_exception_on_unsupported_type(): void
     {
-        $this->expectException(\Arcanedev\SeoHelper\Exceptions\InvalidTwitterCardException::class);
+        $this->expectException(InvalidTwitterCardException::class);
         $this->expectExceptionMessage('The Twitter card type [selfie] is not supported.');
 
         $this->card->setType('selfie');
     }
 
     /** @test */
-    public function it_can_set_prefix()
+    public function it_can_set_prefix(): void
     {
         $prefix     = 'twt:';
         $this->card = new Card([
@@ -109,7 +114,7 @@ public function it_can_set_prefix()
     }
 
     /** @test */
-    public function it_can_set_and_render_title()
+    public function it_can_set_and_render_title(): void
     {
         $title = 'Hello world';
         $this->card->setTitle($title);
@@ -121,7 +126,7 @@ public function it_can_set_and_render_title()
     }
 
     /** @test */
-    public function it_can_set_and_render_description()
+    public function it_can_set_and_render_description(): void
     {
         $description = 'Hello world description';
         $this->card->setDescription($description);
@@ -133,7 +138,7 @@ public function it_can_set_and_render_description()
     }
 
     /** @test */
-    public function it_can_set_and_render_site()
+    public function it_can_set_and_render_site(): void
     {
         $site     = 'Arcanedev';
         $excepted = '<meta name="twitter:site" content="@'.$site.'">';
@@ -150,7 +155,7 @@ public function it_can_set_and_render_site()
     }
 
     /** @test */
-    public function it_can_add_and_render_one_image()
+    public function it_can_add_and_render_one_image(): void
     {
         $avatar   = 'http://example.com/img/avatar.png';
         $this->card->addImage($avatar);
@@ -161,7 +166,7 @@ public function it_can_add_and_render_one_image()
     }
 
     /** @test */
-    public function it_can_add_and_render_multiple_images()
+    public function it_can_add_and_render_multiple_images(): void
     {
         $avatar = 'http://example.com/img/avatar.png';
         $number = range(0, 4);
@@ -180,7 +185,7 @@ public function it_can_add_and_render_multiple_images()
     }
 
     /** @test */
-    public function it_can_add_and_render_many_metas()
+    public function it_can_add_and_render_many_metas(): void
     {
         $metas = [
             'creator' => '@Arcanedev',
@@ -202,7 +207,7 @@ public function it_can_add_and_render_many_metas()
     }
 
     /** @test */
-    public function it_can_reset()
+    public function it_can_reset(): void
     {
         $expected = $this->card->render();
 
diff --git a/tests/Entities/WebmastersTest.php b/tests/Entities/WebmastersTest.php
index 8c92620..f48c138 100644
--- a/tests/Entities/WebmastersTest.php
+++ b/tests/Entities/WebmastersTest.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Tests\Entities;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests\Entities;
 
 use Arcanedev\SeoHelper\Entities\Webmasters;
 use Arcanedev\SeoHelper\Tests\TestCase;
@@ -45,7 +49,7 @@ public function tearDown(): void
      */
 
     /** @test */
-    public function it_can_be_instantiated()
+    public function it_can_be_instantiated(): void
     {
         $expectations = [
             \Arcanedev\SeoHelper\Entities\Webmasters::class,
@@ -59,7 +63,7 @@ public function it_can_be_instantiated()
     }
 
     /** @test */
-    public function it_can_render_defaults()
+    public function it_can_render_defaults(): void
     {
         $expectations = [
             '<meta name="google-site-verification" content="site-verification-code">',
@@ -76,7 +80,7 @@ public function it_can_render_defaults()
     }
 
     /** @test */
-    public function it_can_make_and_add()
+    public function it_can_make_and_add(): void
     {
         $this->webmasters = Webmasters::make([
             'google'  => 'site-verification-code'
@@ -96,7 +100,7 @@ public function it_can_make_and_add()
     }
 
     /** @test */
-    public function it_can_skip_unsupported_webmasters()
+    public function it_can_skip_unsupported_webmasters(): void
     {
         $this->webmasters = Webmasters::make([
             'duckduckgo'  => 'site-verification-code'
@@ -107,7 +111,7 @@ public function it_can_skip_unsupported_webmasters()
     }
 
     /** @test */
-    public function it_can_reset()
+    public function it_can_reset(): void
     {
         static::assertNotEmpty($this->webmasters->render());
         static::assertNotEmpty((string) $this->webmasters);
diff --git a/tests/Helpers/MetaTest.php b/tests/Helpers/MetaTest.php
index f8944be..865e42d 100644
--- a/tests/Helpers/MetaTest.php
+++ b/tests/Helpers/MetaTest.php
@@ -1,5 +1,10 @@
-<?php namespace Arcanedev\SeoHelper\Tests\Helpers;
+<?php
 
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests\Helpers;
+
+use Arcanedev\SeoHelper\Exceptions\InvalidArgumentException;
 use Arcanedev\SeoHelper\Helpers\Meta;
 use Arcanedev\SeoHelper\Tests\TestCase;
 
@@ -17,7 +22,7 @@ class MetaTest extends TestCase
      */
 
     /** @test */
-    public function it_can_be_instantiated()
+    public function it_can_be_instantiated(): void
     {
         $results = [
             Meta::make('name', 'Hello world'),
@@ -41,7 +46,7 @@ public function it_can_be_instantiated()
     }
 
     /** @test */
-    public function it_can_valid()
+    public function it_can_valid(): void
     {
         $valids = [
             Meta::make('name', 'Hello world')
@@ -67,7 +72,7 @@ public function it_can_valid()
     }
 
     /** @test */
-    public function it_can_render()
+    public function it_can_render(): void
     {
         static::assertSame(
             '<meta name="name" content="Hello world">',
@@ -91,7 +96,7 @@ public function it_can_render()
     }
 
     /** @test */
-    public function it_can_make_meta_with_prefix()
+    public function it_can_make_meta_with_prefix(): void
     {
         $meta = Meta::make('hello', 'Hello World', 'name', 'say:');
 
@@ -109,7 +114,7 @@ public function it_can_make_meta_with_prefix()
     }
 
     /** @test */
-    public function it_can_clean_and_render()
+    public function it_can_clean_and_render(): void
     {
         $name    = '<b>Awesome name</b>';
         $content = 'Harmless <script>alert("Danger Zone");</script>';
@@ -121,7 +126,7 @@ public function it_can_clean_and_render()
     }
 
     /** @test */
-    public function it_can_make_meta_with_custom_name_property()
+    public function it_can_make_meta_with_custom_name_property(): void
     {
         $meta = Meta::make('title', 'Hello World', 'property', 'og:');
 
@@ -132,7 +137,7 @@ public function it_can_make_meta_with_custom_name_property()
     }
 
     /** @test */
-    public function it_can_set_name_property()
+    public function it_can_set_name_property(): void
     {
         $meta = Meta::make('title', 'Hello World');
 
@@ -146,25 +151,25 @@ public function it_can_set_name_property()
     }
 
     /** @test */
-    public function it_must_throw_an_invalid_argument_exception_on_invalid_type()
+    public function it_must_throw_an_invalid_argument_exception_on_invalid_type(): void
     {
-        $this->expectException(\Arcanedev\SeoHelper\Exceptions\InvalidArgumentException::class);
+        $this->expectException(InvalidArgumentException::class);
         $this->expectExceptionMessage('The meta name property is must be a string value, NULL is given.');
 
         Meta::make('title', 'Hello World')->setNameProperty(null);
     }
 
     /** @test */
-    public function it_must_throw_an_invalid_argument_exception_on_not_allowed_name()
+    public function it_must_throw_an_invalid_argument_exception_on_not_allowed_name(): void
     {
-        $this->expectException(\Arcanedev\SeoHelper\Exceptions\InvalidArgumentException::class);
+        $this->expectException(InvalidArgumentException::class);
         $this->expectExceptionMessage("The meta name property [foo] is not supported, the allowed name properties are ['charset', 'http-equiv', 'itemprop', 'name', 'property'].");
 
         Meta::make('title', 'Hello World')->setNameProperty('foo');
     }
 
     /** @test */
-    public function it_can_render_array_content()
+    public function it_can_render_array_content(): void
     {
         $meta = Meta::make('locale:alternate', ['fr_FR', 'es_ES', 'en_GB']);
 
diff --git a/tests/SeoHelperServiceProviderTest.php b/tests/SeoHelperServiceProviderTest.php
index 0f340af..5f6fec7 100644
--- a/tests/SeoHelperServiceProviderTest.php
+++ b/tests/SeoHelperServiceProviderTest.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Tests;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests;
 
 use Arcanedev\SeoHelper\SeoHelperServiceProvider;
 
@@ -43,7 +47,7 @@ public function tearDown(): void
      */
 
     /** @test */
-    public function it_can_get_service_provider()
+    public function it_can_get_service_provider(): void
     {
         $expectations = [
             \Illuminate\Support\ServiceProvider::class,
@@ -59,7 +63,7 @@ public function it_can_get_service_provider()
     }
 
     /** @test */
-    public function it_can_provides()
+    public function it_can_provides(): void
     {
         $expected = [
             \Arcanedev\SeoHelper\Contracts\SeoHelper::class,
diff --git a/tests/SeoHelperTest.php b/tests/SeoHelperTest.php
index 4010a6f..b569813 100644
--- a/tests/SeoHelperTest.php
+++ b/tests/SeoHelperTest.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Tests;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests;
 
 use Arcanedev\SeoHelper\Contracts\SeoHelper as SeoHelperContract;
 
@@ -43,7 +47,7 @@ public function tearDown(): void
      */
 
     /** @test */
-    public function it_can_be_instantiated()
+    public function it_can_be_instantiated(): void
     {
         $expectations = [
             \Arcanedev\SeoHelper\Contracts\SeoHelper::class,
@@ -57,7 +61,7 @@ public function it_can_be_instantiated()
     }
 
     /** @test */
-    public function it_can_be_instantiated_with_helper()
+    public function it_can_be_instantiated_with_helper(): void
     {
         $this->seoHelper = seo_helper();
         $expectations    = [
@@ -72,7 +76,7 @@ public function it_can_be_instantiated_with_helper()
     }
 
     /** @test */
-    public function it_can_get_seo_meta()
+    public function it_can_get_seo_meta(): void
     {
         $seoMeta = $this->seoHelper->meta();
 
@@ -88,7 +92,7 @@ public function it_can_get_seo_meta()
     }
 
     /** @test */
-    public function it_can_get_seo_open_graph()
+    public function it_can_get_seo_open_graph(): void
     {
         $ogs = [
             $this->seoHelper->openGraph(),
@@ -109,7 +113,7 @@ public function it_can_get_seo_open_graph()
     }
 
     /** @test */
-    public function it_can_set_and_render_title()
+    public function it_can_set_and_render_title(): void
     {
         $title        = 'Hello World';
         $siteName     = 'ARCANEDEV';
@@ -130,7 +134,7 @@ public function it_can_set_and_render_title()
     }
 
     /** @test */
-    public function it_can_set_and_render_site_name()
+    public function it_can_set_and_render_site_name(): void
     {
         $title        = 'My Application';
         $siteName     = 'ARCANEDEV';
@@ -151,7 +155,7 @@ public function it_can_set_and_render_site_name()
     }
 
     /** @test */
-    public function it_can_toggle_site_name_visibility()
+    public function it_can_toggle_site_name_visibility(): void
     {
         $title    = 'My Application';
         $siteName = 'ARCANEDEV';
@@ -179,7 +183,7 @@ public function it_can_toggle_site_name_visibility()
     }
 
     /** @test */
-    public function it_can_set_and_render_description()
+    public function it_can_set_and_render_description(): void
     {
         $description  = 'ARCANEDEV super description';
         $expectations = [
@@ -197,7 +201,7 @@ public function it_can_set_and_render_description()
     }
 
     /** @test */
-    public function it_can_set_and_render_keywords()
+    public function it_can_set_and_render_keywords(): void
     {
         $keywords = $this->getSeoHelperConfig('keywords.default');
         $expected = '<meta name="keywords" content="'.implode(', ', $keywords).'">';
@@ -214,7 +218,7 @@ public function it_can_set_and_render_keywords()
     }
 
     /** @test */
-    public function it_can_set_and_render_image()
+    public function it_can_set_and_render_image(): void
     {
         $this->seoHelper->setImage($imageUrl = 'http://localhost/assets/img/logo.png');
 
@@ -229,9 +233,9 @@ public function it_can_set_and_render_image()
             static::assertStringContainsString($expected, $rendered);
         }
     }
-    
+
     /** @test */
-    public function it_can_set_and_render_url()
+    public function it_can_set_and_render_url(): void
     {
         $this->seoHelper->setUrl($url = 'http://localhost/path');
 
@@ -248,7 +252,7 @@ public function it_can_set_and_render_url()
     }
 
     /** @test */
-    public function it_can_render_all()
+    public function it_can_render_all(): void
     {
         $output = $this->seoHelper->render();
 
@@ -256,7 +260,7 @@ public function it_can_render_all()
     }
 
     /** @test */
-    public function it_can_render_all_with_html_string_object()
+    public function it_can_render_all_with_html_string_object(): void
     {
         $output = $this->seoHelper->renderHtml();
 
@@ -265,7 +269,7 @@ public function it_can_render_all_with_html_string_object()
     }
 
     /** @test */
-    public function it_can_enable_and_disable_open_graph()
+    public function it_can_enable_and_disable_open_graph(): void
     {
         $needle = '<meta property="og:';
 
@@ -299,7 +303,7 @@ public function it_can_enable_and_disable_open_graph()
     }
 
     /** @test */
-    public function it_can_enable_and_disable_twitter_card()
+    public function it_can_enable_and_disable_twitter_card(): void
     {
         $needle = '<meta name="twitter:';
 
diff --git a/tests/SeoMetaTest.php b/tests/SeoMetaTest.php
index 1a11448..b045025 100644
--- a/tests/SeoMetaTest.php
+++ b/tests/SeoMetaTest.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Tests;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests;
 
 use Arcanedev\SeoHelper\Contracts\SeoMeta as SeoMetaContract;
 use Arcanedev\SeoHelper\SeoMeta;
@@ -47,7 +51,7 @@ public function tearDown(): void
      */
 
     /** @test */
-    public function it_can_be_instantiated()
+    public function it_can_be_instantiated(): void
     {
         $expectations = [
             \Arcanedev\SeoHelper\Contracts\Renderable::class,
@@ -63,7 +67,7 @@ public function it_can_be_instantiated()
     }
 
     /** @test */
-    public function it_can_be_instantiated_by_container()
+    public function it_can_be_instantiated_by_container(): void
     {
         $this->seoMeta = $this->app[SeoMetaContract::class];
 
@@ -73,7 +77,7 @@ public function it_can_be_instantiated_by_container()
     }
 
     /** @test */
-    public function it_can_set_and_get_and_render_title()
+    public function it_can_set_and_get_and_render_title(): void
     {
         $title    = 'Awesome Title';
         $siteName = $this->getSeoHelperConfig('title.site-name');
@@ -118,7 +122,7 @@ public function it_can_set_and_get_and_render_title()
     }
 
     /** @test */
-    public function it_can_set_and_get_and_render_description()
+    public function it_can_set_and_get_and_render_description(): void
     {
         $description = 'Awesome Description';
         $this->seoMeta->setDescription($description);
@@ -143,7 +147,7 @@ public function it_can_set_and_get_and_render_description()
     }
 
     /** @test */
-    public function it_can_set_and_get_and_render_keywords()
+    public function it_can_set_and_get_and_render_keywords(): void
     {
         $keywords = ['keyword-1', 'keyword-2', 'keyword-3', 'keyword-4', 'keyword-5'];
 
@@ -183,7 +187,7 @@ public function it_can_set_and_get_and_render_keywords()
     }
 
     /** @test */
-    public function it_can_add_one_keyword()
+    public function it_can_add_one_keyword(): void
     {
         $keywords = ['keyword-1', 'keyword-2', 'keyword-3', 'keyword-4', 'keyword-5'];
         $this->seoMeta->setKeywords($keywords);
@@ -203,7 +207,7 @@ public function it_can_add_one_keyword()
     }
 
     /** @test */
-    public function it_can_add_many_keywords()
+    public function it_can_add_many_keywords(): void
     {
         $keywords = ['keyword-1', 'keyword-2', 'keyword-3', 'keyword-4', 'keyword-5'];
         $expected = '<meta name="keywords" content="'.implode(', ', $keywords).'">';
@@ -223,7 +227,7 @@ public function it_can_add_many_keywords()
     }
 
     /** @test */
-    public function it_can_add_remove_reset_and_render_a_misc_tag()
+    public function it_can_add_remove_reset_and_render_a_misc_tag(): void
     {
         $expectations = [
             '<meta name="robots" content="noindex, nofollow">',
@@ -306,7 +310,7 @@ public function it_can_add_remove_reset_and_render_a_misc_tag()
     }
 
     /** @test */
-    public function it_can_render_add_reset_webmasters()
+    public function it_can_render_add_reset_webmasters(): void
     {
         $expectations = [
             '<meta name="google-site-verification" content="site-verification-code">',
@@ -350,7 +354,7 @@ public function it_can_render_add_reset_webmasters()
     }
 
     /** @test */
-    public function it_can_set_and_render_google_analytics()
+    public function it_can_set_and_render_google_analytics(): void
     {
         static::assertStringContainsString(
             "ga('create', 'UA-12345678-9', 'auto');",
@@ -386,7 +390,7 @@ public function it_can_set_and_render_google_analytics()
      *
      * @param  \Arcanedev\SeoHelper\Contracts\Entities\MetaCollection  $metas
      */
-    protected static function assertMetaCollection($metas)
+    protected static function assertMetaCollection($metas): void
     {
         $expectations = [
             \Arcanedev\SeoHelper\Contracts\Entities\MetaCollection::class,
diff --git a/tests/SeoOpenGraphTest.php b/tests/SeoOpenGraphTest.php
index 7dcdd8d..6d9dfb1 100644
--- a/tests/SeoOpenGraphTest.php
+++ b/tests/SeoOpenGraphTest.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Tests;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests;
 
 use Arcanedev\SeoHelper\SeoOpenGraph;
 
@@ -44,7 +48,7 @@ public function tearDown(): void
      */
 
     /** @test */
-    public function it_can_be_instantiated()
+    public function it_can_be_instantiated(): void
     {
         $expectations = [
             \Arcanedev\SeoHelper\SeoOpenGraph::class,
@@ -58,7 +62,7 @@ public function it_can_be_instantiated()
     }
 
     /** @test */
-    public function it_can_render_defaults()
+    public function it_can_render_defaults(): void
     {
         $expectations = [
             '<meta property="og:type" content="website">',
@@ -73,7 +77,7 @@ public function it_can_render_defaults()
     }
 
     /** @test */
-    public function it_can_set_and_render_prefix()
+    public function it_can_set_and_render_prefix(): void
     {
         $this->seoOpenGraph->setPrefix('open-graph:');
 
@@ -90,7 +94,7 @@ public function it_can_set_and_render_prefix()
     }
 
     /** @test */
-    public function it_can_set_and_render_type()
+    public function it_can_set_and_render_type(): void
     {
         $types = [
             'article',
@@ -110,7 +114,7 @@ public function it_can_set_and_render_type()
     }
 
     /** @test */
-    public function it_can_set_and_render_title()
+    public function it_can_set_and_render_title(): void
     {
         $title = 'Hello World';
 
@@ -123,7 +127,7 @@ public function it_can_set_and_render_title()
     }
 
     /** @test */
-    public function it_can_set_and_render_description()
+    public function it_can_set_and_render_description(): void
     {
         $description = 'Hello World detailed description.';
 
@@ -136,7 +140,7 @@ public function it_can_set_and_render_description()
     }
 
     /** @test */
-    public function it_can_set_and_render_url()
+    public function it_can_set_and_render_url(): void
     {
         $url = 'http://www.imdb.com/title/tt0080339/';
 
@@ -149,7 +153,7 @@ public function it_can_set_and_render_url()
     }
 
     /** @test */
-    public function it_can_set_and_render_image()
+    public function it_can_set_and_render_image(): void
     {
         $image = 'http://ia.media-imdb.com/images/M/MV5BNDU2MjE4MTcwNl5BMl5BanBnXkFtZTgwNDExOTMxMDE@._V1_UY1200_CR90,0,630,1200_AL_.jpg';
 
@@ -162,7 +166,7 @@ public function it_can_set_and_render_image()
     }
 
     /** @test */
-    public function it_can_set_and_render_site_name()
+    public function it_can_set_and_render_site_name(): void
     {
         $siteName = 'My site name';
 
@@ -175,7 +179,7 @@ public function it_can_set_and_render_site_name()
     }
 
     /** @test */
-    public function it_can_add_and_render_property()
+    public function it_can_add_and_render_property(): void
     {
         $locales = [
             'ar', 'en', 'en_US', 'es', 'fr', 'fr_FR',
@@ -192,7 +196,7 @@ public function it_can_add_and_render_property()
     }
 
     /** @test */
-    public function it_can_add_render_properties()
+    public function it_can_add_render_properties(): void
     {
         $properties = [
             'locale'           => 'en_GB',
@@ -214,7 +218,7 @@ public function it_can_add_render_properties()
     }
 
     /** @test */
-    public function it_can_enable_and_disable()
+    public function it_can_enable_and_disable(): void
     {
         static::assertTrue($this->seoOpenGraph->isEnabled());
         static::assertFalse($this->seoOpenGraph->isDisabled());
@@ -234,7 +238,7 @@ public function it_can_enable_and_disable()
     }
 
     /** @test */
-    public function it_can_set_and_render_locale_property()
+    public function it_can_set_and_render_locale_property(): void
     {
         $locales = ['fr_FR', 'en_GB', 'es_ES'];
 
@@ -247,7 +251,7 @@ public function it_can_set_and_render_locale_property()
     }
 
     /** @test */
-    public function it_can_set_and_render_alternative_properties()
+    public function it_can_set_and_render_alternative_properties(): void
     {
         $this->seoOpenGraph->setAlternativeLocales(['fr_FR', 'en_GB', 'es_ES']);
 
diff --git a/tests/SeoTwitterTest.php b/tests/SeoTwitterTest.php
index df61316..ba67e81 100644
--- a/tests/SeoTwitterTest.php
+++ b/tests/SeoTwitterTest.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Tests;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests;
 
 use Arcanedev\SeoHelper\SeoTwitter;
 
@@ -44,7 +48,7 @@ public function tearDown(): void
      */
 
     /** @test */
-    public function it_can_be_instantiated()
+    public function it_can_be_instantiated(): void
     {
         $expectations = [
             \Arcanedev\SeoHelper\SeoTwitter::class,
@@ -58,7 +62,7 @@ public function it_can_be_instantiated()
     }
 
     /** @test */
-    public function it_can_render_defaults()
+    public function it_can_render_defaults(): void
     {
         $output = $this->seoTwitter->render();
 
@@ -74,7 +78,7 @@ public function it_can_render_defaults()
     }
 
     /** @test */
-    public function it_can_set_and_render_type()
+    public function it_can_set_and_render_type(): void
     {
         $this->seoTwitter->setType('app');
 
@@ -85,7 +89,7 @@ public function it_can_set_and_render_type()
     }
 
     /** @test */
-    public function it_can_set_and_render_site()
+    public function it_can_set_and_render_site(): void
     {
         $this->seoTwitter->setSite('Arcanedev');
 
@@ -96,7 +100,7 @@ public function it_can_set_and_render_site()
     }
 
     /** @test */
-    public function it_can_set_and_render_title()
+    public function it_can_set_and_render_title(): void
     {
         $this->seoTwitter->setTitle('ARCANEDEV super title');
 
@@ -107,7 +111,7 @@ public function it_can_set_and_render_title()
     }
 
     /** @test */
-    public function it_can_set_and_render_description()
+    public function it_can_set_and_render_description(): void
     {
         $this->seoTwitter->setDescription('ARCANEDEV super description');
 
@@ -118,7 +122,7 @@ public function it_can_set_and_render_description()
     }
 
     /** @test */
-    public function it_can_add_and_render_image()
+    public function it_can_add_and_render_image(): void
     {
         $this->seoTwitter->addImage('http://example.com/img/avatar.png');
 
@@ -129,7 +133,7 @@ public function it_can_add_and_render_image()
     }
 
     /** @test */
-    public function it_can_reset_card()
+    public function it_can_reset_card(): void
     {
         $expected = $this->seoTwitter->render();
 
@@ -146,7 +150,7 @@ public function it_can_reset_card()
     }
 
     /** @test */
-    public function it_can_add_and_render_a_meta()
+    public function it_can_add_and_render_a_meta(): void
     {
         $this->seoTwitter->addMeta('creator', '@Arcanedev');
 
@@ -157,7 +161,7 @@ public function it_can_add_and_render_a_meta()
     }
 
     /** @test */
-    public function it_can_add_and_render_many_metas()
+    public function it_can_add_and_render_many_metas(): void
     {
         $metas = [
             'creator' => '@Arcanedev',
@@ -179,7 +183,7 @@ public function it_can_add_and_render_many_metas()
     }
 
     /** @test */
-    public function it_can_enable_and_disable()
+    public function it_can_enable_and_disable(): void
     {
         static::assertTrue($this->seoTwitter->isEnabled());
         static::assertFalse($this->seoTwitter->isDisabled());
diff --git a/tests/Stubs/Dummy.php b/tests/Stubs/Dummy.php
index aa7fde0..fd6c50b 100644
--- a/tests/Stubs/Dummy.php
+++ b/tests/Stubs/Dummy.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Tests\Stubs;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests\Stubs;
 
 use Arcanedev\SeoHelper\Traits\Seoable;
 
diff --git a/tests/TestCase.php b/tests/TestCase.php
index 13d314b..b10dab0 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Tests;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests;
 
 use Orchestra\Testbench\TestCase as BaseTestCase;
 
@@ -36,33 +40,19 @@ public function setUp(): void
      *
      * @return array
      */
-    protected function getPackageProviders($app)
+    protected function getPackageProviders($app): array
     {
         return [
             \Arcanedev\SeoHelper\SeoHelperServiceProvider::class,
         ];
     }
 
-    /**
-     * Get package aliases.
-     *
-     * @param  \Illuminate\Foundation\Application  $app
-     *
-     * @return array
-     */
-    protected function getPackageAliases($app)
-    {
-        return [
-            //
-        ];
-    }
-
     /**
      * Define environment setup.
      *
      * @param  \Illuminate\Foundation\Application  $app
      */
-    protected function getEnvironmentSetUp($app)
+    protected function getEnvironmentSetUp($app): void
     {
         // Keywords
         $app['config']->set('seo-helper.keywords', [
@@ -94,7 +84,7 @@ protected function getEnvironmentSetUp($app)
     /**
      * Get Config instance.
      *
-     * @return \Illuminate\Config\Repository
+     * @return \Illuminate\Contracts\Config\Repository
      */
     protected function config()
     {
diff --git a/tests/Traits/SeoableTest.php b/tests/Traits/SeoableTest.php
index 7e112ef..d37cd9f 100644
--- a/tests/Traits/SeoableTest.php
+++ b/tests/Traits/SeoableTest.php
@@ -1,4 +1,8 @@
-<?php namespace Arcanedev\SeoHelper\Tests\Traits;
+<?php
+
+declare(strict_types=1);
+
+namespace Arcanedev\SeoHelper\Tests\Traits;
 
 use Arcanedev\SeoHelper\Tests\Stubs\Dummy;
 use Arcanedev\SeoHelper\Tests\TestCase;
@@ -44,7 +48,7 @@ public function tearDown(): void
      */
 
     /** @test */
-    public function it_can_get_main_helper()
+    public function it_can_get_main_helper(): void
     {
         $seoHelper = $this->dummy->seo();
 
@@ -60,7 +64,7 @@ public function it_can_get_main_helper()
     }
 
     /** @test */
-    public function it_can_get_meta_helper()
+    public function it_can_get_meta_helper(): void
     {
         $seoMeta = $this->dummy->seoMeta();
 
@@ -76,7 +80,7 @@ public function it_can_get_meta_helper()
     }
 
     /** @test */
-    public function it_can_get_open_graph_helper()
+    public function it_can_get_open_graph_helper(): void
     {
         $seoOpenGraph = $this->dummy->seoGraph();
 
@@ -92,7 +96,7 @@ public function it_can_get_open_graph_helper()
     }
 
     /** @test */
-    public function it_can_get_twitter_card_helper()
+    public function it_can_get_twitter_card_helper(): void
     {
         $seoTwitter   = $this->dummy->seoCard();
         $expectations = [
@@ -107,7 +111,7 @@ public function it_can_get_twitter_card_helper()
     }
 
     /** @test */
-    public function it_can_set_and_render_title()
+    public function it_can_set_and_render_title(): void
     {
         $title        = 'Hello World';
         $siteName     = 'ARCANEDEV';
@@ -130,7 +134,7 @@ public function it_can_set_and_render_title()
     }
 
     /** @test */
-    public function it_can_set_and_render_description()
+    public function it_can_set_and_render_description(): void
     {
         $description  = 'ARCANEDEV super description';
         $expectations = [
@@ -151,7 +155,7 @@ public function it_can_set_and_render_description()
     }
 
     /** @test */
-    public function it_can_set_and_render_keywords()
+    public function it_can_set_and_render_keywords(): void
     {
         $keywords = $this->getSeoHelperConfig('keywords.default');
         $expected = '<meta name="keywords" content="'.implode(', ', $keywords).'">';