diff --git a/Gemfile b/Gemfile
index 8fa280a..f94922e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,6 +7,7 @@ gem 'pg'
 gem 'figaro'
 gem 'jbuilder', '~> 2.0'
 gem 'redis'
+gem 'rest-client'
 
 gem 'sass-rails'
 gem 'jquery-rails'
diff --git a/Gemfile.lock b/Gemfile.lock
index 797ba03..396d77b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -55,6 +55,8 @@ GEM
     coderay (1.1.1)
     concurrent-ruby (1.0.2)
     debug_inspector (0.0.2)
+    domain_name (0.5.20160615)
+      unf (>= 0.0.5, < 1.0.0)
     erubis (2.7.0)
     execjs (2.7.0)
     ffi (1.9.14)
@@ -64,6 +66,8 @@ GEM
       sass (>= 3.2)
     globalid (0.3.7)
       activesupport (>= 4.1.0)
+    http-cookie (1.0.2)
+      domain_name (~> 0.5)
     i18n (0.7.0)
     jbuilder (2.6.0)
       activesupport (>= 3.0.0, < 5.1)
@@ -86,6 +90,7 @@ GEM
     mini_portile2 (2.1.0)
     minitest (5.9.1)
     multi_json (1.12.1)
+    netrc (0.11.0)
     nio4r (1.2.1)
     nokogiri (1.6.8.1)
       mini_portile2 (~> 2.1.0)
@@ -131,6 +136,10 @@ GEM
     rb-inotify (0.9.7)
       ffi (>= 0.5.0)
     redis (3.3.1)
+    rest-client (2.0.0)
+      http-cookie (>= 1.0.2, < 2.0)
+      mime-types (>= 1.16, < 4.0)
+      netrc (~> 0.8)
     sass (3.4.22)
     sass-rails (5.0.6)
       railties (>= 4.0.0, < 6)
@@ -161,6 +170,9 @@ GEM
       thread_safe (~> 0.1)
     uglifier (3.0.2)
       execjs (>= 0.3.0, < 3)
+    unf (0.1.4)
+      unf_ext
+    unf_ext (0.0.7.2)
     websocket-driver (0.6.4)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.2)
@@ -184,6 +196,7 @@ DEPENDENCIES
   puma
   rails (= 5.0.0.1)
   redis
+  rest-client
   sass-rails
   simple_form
   spring
diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index 24d15e5..5da4d7b 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -5,13 +5,25 @@
 class UsersController < ApplicationController
   def show
     input_user = params[:user]
-    access_token = "?access_token=" + ENV['github_token']
-    @user = JSON.parse(open("https://api.github.com/users/#{input_user}" + access_token).read)
-    user_repos = JSON.parse(open("https://api.github.com/users/#{input_user}/repos" + access_token).read)
+    access_token = '?access_token=' + ENV['github_token']
+
+    @user = JSON.parse RestClient::Request.execute(
+      method: :get,
+      url: "https://api.github.com/users/#{input_user}#{access_token}"
+    )
+
+    user_repos = JSON.parse RestClient::Request.execute(
+      method: :get,
+      url: "https://api.github.com/users/#{input_user}/repos#{access_token}"
+    )
+
     user_lang = {}
     total_bytes = 0
     user_repos.delete_if { |repo| repo['fork'] == true } .each do |repo|
-      repo_lang = JSON.parse(open(repo['languages_url'] + access_token).read)
+      repo_lang = JSON.parse RestClient::Request.execute(
+        method: :get,
+        url: "#{repo['languages_url']}#{access_token}"
+      )
       repo_lang.each do |lang, bytes|
         user_lang[lang] ||= 0
         user_lang[lang] += bytes
@@ -23,5 +35,11 @@ def show
         lang_pair << percentage
       end
     end
+  rescue URI::InvalidURIError
+    { 'error' => { 'message' => 'url error' } }
+  rescue RestClient::ResourceNotFound
+    { 'error' => { 'message' => 'rest ressource error' } }
+  rescue RestClient::Forbidden
+    { 'error' => { 'message' => 'forbidden' } }
   end
 end