diff --git a/Gemfile b/Gemfile
index 0724b52..093f773 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,6 +3,10 @@ source "https://rubygems.org"
 gemspec
 
 group :test do
+  gem "rake"
+  gem "bundler"
+  gem "rubocop"
+  gem "overcommit"
   gem "coveralls", "~>0.8", require: false
   gem "simplecov", "~>0.10", require: false
   gem "codeclimate-test-reporter", "~>0.4"
diff --git a/Gemfile.lock b/Gemfile.lock
index f3502b0..e2fa964 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    github_changelog_generator (1.11.2)
+    github_changelog_generator (1.11.3)
       bundler (>= 1.7)
       colorize (~> 0.7)
       github_api (~> 0.12)
@@ -98,9 +98,13 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  bundler
   codeclimate-test-reporter (~> 0.4)
   coveralls (~> 0.8)
   github_changelog_generator!
+  overcommit
+  rake
+  rubocop
   simplecov (~> 0.10)
 
 BUNDLED WITH