diff --git a/.gitignore b/.gitignore
index d8e0394..21cd82e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 /vendor/
 .idea
-/tests/certs
\ No newline at end of file
+/tests/certs
+/example/working_example.php
\ No newline at end of file
diff --git a/composer.json b/composer.json
index a69cf36..b1b484f 100644
--- a/composer.json
+++ b/composer.json
@@ -22,11 +22,11 @@
     "minimum-stability": "stable",
     "require": {
         "php": ">=8.0",
-        "guzzlehttp/guzzle": "^6.5",
         "ext-json": "*",
         "ramsey/uuid": "^4.1",
         "firebase/php-jwt": "^5.2",
-        "ext-openssl": "*"
+        "ext-openssl": "*",
+        "guzzlehttp/guzzle": "^7.2"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.5"
diff --git a/composer.lock b/composer.lock
index 2fcd8f2..251f8f2 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "496eab4ca9609493e904428038795540",
+    "content-hash": "d9642058c98f986cba56392ed14b2400",
     "packages": [
         {
             "name": "brick/math",
@@ -118,37 +118,43 @@
         },
         {
             "name": "guzzlehttp/guzzle",
-            "version": "6.5.5",
+            "version": "7.2.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/guzzle/guzzle.git",
-                "reference": "9d4290de1cfd701f38099ef7e183b64b4b7b0c5e"
+                "reference": "0aa74dfb41ae110835923ef10a9d803a22d50e79"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/9d4290de1cfd701f38099ef7e183b64b4b7b0c5e",
-                "reference": "9d4290de1cfd701f38099ef7e183b64b4b7b0c5e",
+                "url": "https://api.github.com/repos/guzzle/guzzle/zipball/0aa74dfb41ae110835923ef10a9d803a22d50e79",
+                "reference": "0aa74dfb41ae110835923ef10a9d803a22d50e79",
                 "shasum": ""
             },
             "require": {
                 "ext-json": "*",
-                "guzzlehttp/promises": "^1.0",
-                "guzzlehttp/psr7": "^1.6.1",
-                "php": ">=5.5",
-                "symfony/polyfill-intl-idn": "^1.17.0"
+                "guzzlehttp/promises": "^1.4",
+                "guzzlehttp/psr7": "^1.7",
+                "php": "^7.2.5 || ^8.0",
+                "psr/http-client": "^1.0"
+            },
+            "provide": {
+                "psr/http-client-implementation": "1.0"
             },
             "require-dev": {
                 "ext-curl": "*",
-                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.4 || ^7.0",
+                "php-http/client-integration-tests": "^3.0",
+                "phpunit/phpunit": "^8.5.5 || ^9.3.5",
                 "psr/log": "^1.1"
             },
             "suggest": {
+                "ext-curl": "Required for CURL handler support",
+                "ext-intl": "Required for Internationalized Domain Name (IDN) support",
                 "psr/log": "Required for using the Log middleware"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "6.5-dev"
+                    "dev-master": "7.1-dev"
                 }
             },
             "autoload": {
@@ -168,6 +174,11 @@
                     "name": "Michael Dowling",
                     "email": "mtdowling@gmail.com",
                     "homepage": "https://github.com/mtdowling"
+                },
+                {
+                    "name": "Márk Sági-Kazár",
+                    "email": "mark.sagikazar@gmail.com",
+                    "homepage": "https://sagikazarmark.hu"
                 }
             ],
             "description": "Guzzle is a PHP HTTP client library",
@@ -178,14 +189,34 @@
                 "framework",
                 "http",
                 "http client",
+                "psr-18",
+                "psr-7",
                 "rest",
                 "web service"
             ],
             "support": {
                 "issues": "https://github.com/guzzle/guzzle/issues",
-                "source": "https://github.com/guzzle/guzzle/tree/6.5"
+                "source": "https://github.com/guzzle/guzzle/tree/7.2.0"
             },
-            "time": "2020-06-16T21:01:06+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/GrahamCampbell",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/Nyholm",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/alexeyshockov",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/gmponos",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-10-10T11:47:56+00:00"
         },
         {
             "name": "guzzlehttp/promises",
@@ -318,141 +349,56 @@
             "time": "2020-09-30T07:37:11+00:00"
         },
         {
-            "name": "lcobucci/clock",
-            "version": "2.0.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/lcobucci/clock.git",
-                "reference": "353d83fe2e6ae95745b16b3d911813df6a05bfb3"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/lcobucci/clock/zipball/353d83fe2e6ae95745b16b3d911813df6a05bfb3",
-                "reference": "353d83fe2e6ae95745b16b3d911813df6a05bfb3",
-                "shasum": ""
-            },
-            "require": {
-                "php": "^7.4 || ^8.0"
-            },
-            "require-dev": {
-                "infection/infection": "^0.17",
-                "lcobucci/coding-standard": "^6.0",
-                "phpstan/extension-installer": "^1.0",
-                "phpstan/phpstan": "^0.12",
-                "phpstan/phpstan-deprecation-rules": "^0.12",
-                "phpstan/phpstan-phpunit": "^0.12",
-                "phpstan/phpstan-strict-rules": "^0.12",
-                "phpunit/php-code-coverage": "9.1.4",
-                "phpunit/phpunit": "9.3.7"
-            },
-            "type": "library",
-            "autoload": {
-                "psr-4": {
-                    "Lcobucci\\Clock\\": "src"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Luís Cobucci",
-                    "email": "lcobucci@gmail.com"
-                }
-            ],
-            "description": "Yet another clock abstraction",
-            "support": {
-                "issues": "https://github.com/lcobucci/clock/issues",
-                "source": "https://github.com/lcobucci/clock/tree/2.0.x"
-            },
-            "funding": [
-                {
-                    "url": "https://github.com/lcobucci",
-                    "type": "github"
-                },
-                {
-                    "url": "https://www.patreon.com/lcobucci",
-                    "type": "patreon"
-                }
-            ],
-            "time": "2020-08-27T18:56:02+00:00"
-        },
-        {
-            "name": "lcobucci/jwt",
-            "version": "4.0.0",
+            "name": "psr/http-client",
+            "version": "1.0.1",
             "source": {
                 "type": "git",
-                "url": "https://github.com/lcobucci/jwt.git",
-                "reference": "6d8665ccd924dc076a9b65d1ea8abe21d68f6958"
+                "url": "https://github.com/php-fig/http-client.git",
+                "reference": "2dfb5f6c5eff0e91e20e913f8c5452ed95b86621"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/lcobucci/jwt/zipball/6d8665ccd924dc076a9b65d1ea8abe21d68f6958",
-                "reference": "6d8665ccd924dc076a9b65d1ea8abe21d68f6958",
+                "url": "https://api.github.com/repos/php-fig/http-client/zipball/2dfb5f6c5eff0e91e20e913f8c5452ed95b86621",
+                "reference": "2dfb5f6c5eff0e91e20e913f8c5452ed95b86621",
                 "shasum": ""
             },
             "require": {
-                "ext-mbstring": "*",
-                "ext-openssl": "*",
-                "lcobucci/clock": "^2.0",
-                "php": "^7.4 || ^8.0"
-            },
-            "require-dev": {
-                "infection/infection": "^0.20",
-                "lcobucci/coding-standard": "^6.0",
-                "mikey179/vfsstream": "^1.6",
-                "phpbench/phpbench": "^0.17",
-                "phpstan/extension-installer": "^1.0",
-                "phpstan/phpstan": "^0.12",
-                "phpstan/phpstan-deprecation-rules": "^0.12",
-                "phpstan/phpstan-phpunit": "^0.12",
-                "phpstan/phpstan-strict-rules": "^0.12",
-                "phpunit/php-invoker": "^3.1",
-                "phpunit/phpunit": "^9.4"
+                "php": "^7.0 || ^8.0",
+                "psr/http-message": "^1.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0-dev"
+                    "dev-master": "1.0.x-dev"
                 }
             },
             "autoload": {
                 "psr-4": {
-                    "Lcobucci\\JWT\\": "src"
+                    "Psr\\Http\\Client\\": "src/"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
-                "BSD-3-Clause"
+                "MIT"
             ],
             "authors": [
                 {
-                    "name": "Luís Cobucci",
-                    "email": "lcobucci@gmail.com",
-                    "role": "Developer"
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
                 }
             ],
-            "description": "A simple library to work with JSON Web Token and JSON Web Signature",
+            "description": "Common interface for HTTP clients",
+            "homepage": "https://github.com/php-fig/http-client",
             "keywords": [
-                "JWS",
-                "jwt"
+                "http",
+                "http-client",
+                "psr",
+                "psr-18"
             ],
             "support": {
-                "issues": "https://github.com/lcobucci/jwt/issues",
-                "source": "https://github.com/lcobucci/jwt/tree/4.0.0"
+                "source": "https://github.com/php-fig/http-client/tree/master"
             },
-            "funding": [
-                {
-                    "url": "https://github.com/lcobucci",
-                    "type": "github"
-                },
-                {
-                    "url": "https://www.patreon.com/lcobucci",
-                    "type": "patreon"
-                }
-            ],
-            "time": "2020-11-25T02:06:12+00:00"
+            "time": "2020-06-29T06:28:15+00:00"
         },
         {
             "name": "psr/http-message",
@@ -794,253 +740,6 @@
                 }
             ],
             "time": "2020-10-23T14:02:19+00:00"
-        },
-        {
-            "name": "symfony/polyfill-intl-idn",
-            "version": "v1.20.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/symfony/polyfill-intl-idn.git",
-                "reference": "3b75acd829741c768bc8b1f84eb33265e7cc5117"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-intl-idn/zipball/3b75acd829741c768bc8b1f84eb33265e7cc5117",
-                "reference": "3b75acd829741c768bc8b1f84eb33265e7cc5117",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=7.1",
-                "symfony/polyfill-intl-normalizer": "^1.10",
-                "symfony/polyfill-php72": "^1.10"
-            },
-            "suggest": {
-                "ext-intl": "For best performance"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-main": "1.20-dev"
-                },
-                "thanks": {
-                    "name": "symfony/polyfill",
-                    "url": "https://github.com/symfony/polyfill"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Symfony\\Polyfill\\Intl\\Idn\\": ""
-                },
-                "files": [
-                    "bootstrap.php"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Laurent Bassin",
-                    "email": "laurent@bassin.info"
-                },
-                {
-                    "name": "Trevor Rowbotham",
-                    "email": "trevor.rowbotham@pm.me"
-                },
-                {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                }
-            ],
-            "description": "Symfony polyfill for intl's idn_to_ascii and idn_to_utf8 functions",
-            "homepage": "https://symfony.com",
-            "keywords": [
-                "compatibility",
-                "idn",
-                "intl",
-                "polyfill",
-                "portable",
-                "shim"
-            ],
-            "support": {
-                "source": "https://github.com/symfony/polyfill-intl-idn/tree/v1.20.0"
-            },
-            "funding": [
-                {
-                    "url": "https://symfony.com/sponsor",
-                    "type": "custom"
-                },
-                {
-                    "url": "https://github.com/fabpot",
-                    "type": "github"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
-                    "type": "tidelift"
-                }
-            ],
-            "time": "2020-10-23T14:02:19+00:00"
-        },
-        {
-            "name": "symfony/polyfill-intl-normalizer",
-            "version": "v1.20.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/symfony/polyfill-intl-normalizer.git",
-                "reference": "727d1096295d807c309fb01a851577302394c897"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-intl-normalizer/zipball/727d1096295d807c309fb01a851577302394c897",
-                "reference": "727d1096295d807c309fb01a851577302394c897",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=7.1"
-            },
-            "suggest": {
-                "ext-intl": "For best performance"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-main": "1.20-dev"
-                },
-                "thanks": {
-                    "name": "symfony/polyfill",
-                    "url": "https://github.com/symfony/polyfill"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Symfony\\Polyfill\\Intl\\Normalizer\\": ""
-                },
-                "files": [
-                    "bootstrap.php"
-                ],
-                "classmap": [
-                    "Resources/stubs"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Nicolas Grekas",
-                    "email": "p@tchwork.com"
-                },
-                {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                }
-            ],
-            "description": "Symfony polyfill for intl's Normalizer class and related functions",
-            "homepage": "https://symfony.com",
-            "keywords": [
-                "compatibility",
-                "intl",
-                "normalizer",
-                "polyfill",
-                "portable",
-                "shim"
-            ],
-            "support": {
-                "source": "https://github.com/symfony/polyfill-intl-normalizer/tree/v1.20.0"
-            },
-            "funding": [
-                {
-                    "url": "https://symfony.com/sponsor",
-                    "type": "custom"
-                },
-                {
-                    "url": "https://github.com/fabpot",
-                    "type": "github"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
-                    "type": "tidelift"
-                }
-            ],
-            "time": "2020-10-23T14:02:19+00:00"
-        },
-        {
-            "name": "symfony/polyfill-php72",
-            "version": "v1.20.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/symfony/polyfill-php72.git",
-                "reference": "cede45fcdfabdd6043b3592e83678e42ec69e930"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-php72/zipball/cede45fcdfabdd6043b3592e83678e42ec69e930",
-                "reference": "cede45fcdfabdd6043b3592e83678e42ec69e930",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=7.1"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-main": "1.20-dev"
-                },
-                "thanks": {
-                    "name": "symfony/polyfill",
-                    "url": "https://github.com/symfony/polyfill"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Symfony\\Polyfill\\Php72\\": ""
-                },
-                "files": [
-                    "bootstrap.php"
-                ]
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Nicolas Grekas",
-                    "email": "p@tchwork.com"
-                },
-                {
-                    "name": "Symfony Community",
-                    "homepage": "https://symfony.com/contributors"
-                }
-            ],
-            "description": "Symfony polyfill backporting some PHP 7.2+ features to lower PHP versions",
-            "homepage": "https://symfony.com",
-            "keywords": [
-                "compatibility",
-                "polyfill",
-                "portable",
-                "shim"
-            ],
-            "support": {
-                "source": "https://github.com/symfony/polyfill-php72/tree/v1.20.0"
-            },
-            "funding": [
-                {
-                    "url": "https://symfony.com/sponsor",
-                    "type": "custom"
-                },
-                {
-                    "url": "https://github.com/fabpot",
-                    "type": "github"
-                },
-                {
-                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
-                    "type": "tidelift"
-                }
-            ],
-            "time": "2020-10-23T14:02:19+00:00"
         }
     ],
     "packages-dev": [
diff --git a/example/working_example.php b/example/working_example.php
deleted file mode 100644
index bf770b8..0000000
--- a/example/working_example.php
+++ /dev/null
@@ -1,56 +0,0 @@
-<?php
-
-$keyfile = '../tests/certs/AuthKey.p8';               // Your p8 Key file
-$keyid = 'GVN5Q3V6GL';                            // Your Key ID
-$teamid = 'X7XGQHWDNM';                           // Your Team ID (see Developer Portal)
-$bundleid = 'com.mobileguardian.app';                // Your Bundle ID
-$url = 'https://api.push.apple.com';  // development url, or use http://api.push.apple.com for production environment
-$token = 'e2c48ed32ef9b018';              // Device Token
-
-$message = '{"aps":{"alert":"Hi there!","sound":"default"}}';
-
-$key = openssl_pkey_get_private(file_get_contents('../tests/certs/AuthKey.p8'));
-
-$header = ['alg'=>'ES256','kid'=>$keyid];
-$claims = ['iss'=>$teamid,'iat'=>time()];
-
-$header_encoded = base64($header);
-$claims_encoded = base64($claims);
-
-$signature = '';
-openssl_sign($header_encoded . '.' . $claims_encoded, $signature, $key, 'sha256');
-$jwt = $header_encoded . '.' . $claims_encoded . '.' . base64_encode($signature);
-
-// only needed for PHP prior to 5.5.24
-if (!defined('CURL_HTTP_VERSION_2_0')) {
-    define('CURL_HTTP_VERSION_2_0', 3);
-}
-
-$http2ch = curl_init();
-curl_setopt_array($http2ch, array(
-    CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_2_0,
-    CURLOPT_URL => "$url/3/device/$token",
-    CURLOPT_PORT => 443,
-    CURLOPT_HTTPHEADER => array(
-        "apns-topic: {$bundleid}",
-        "authorization: bearer $jwt"
-    ),
-    CURLOPT_POST => TRUE,
-    CURLOPT_POSTFIELDS => $message,
-    CURLOPT_RETURNTRANSFER => TRUE,
-    CURLOPT_TIMEOUT => 30,
-    CURLOPT_HEADER => 1
-));
-
-$result = curl_exec($http2ch);
-if ($result === FALSE) {
-    throw new Exception("Curl failed: ".curl_error($http2ch));
-}
-
-$status = curl_getinfo($http2ch, CURLINFO_HTTP_CODE);
-echo $status;
-echo curl_multi_getcontent($http2ch);
-
-function base64($data) {
-    return rtrim(strtr(base64_encode(json_encode($data)), '+/', '-_'), '=');
-}