diff --git a/Gemfile b/Gemfile
index 6f513c2c5..8fbbbed0c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -43,6 +43,8 @@ gem 'rest-client'
 gem 'ohm', '~> 1.3.2' # Ohm 2 breaks the compatibility with previous versions.
 gem 'ohm-expire', '~> 0.1.3'
 
+gem 'pygments.rb'
+
 gem 'ffi'
 
 gem 'attr_encrypted'