diff --git a/Gemfile b/Gemfile
--- a/Gemfile
+++ b/Gemfile
@@ -41,6 +41,8 @@
 gem 'jquery-ui-sass-rails'
 gem 'jquery-timepicker-addon-rails'
 
+#syntax highlighter
+gem 'rouge'
 
 gem "haml"
 gem "mail"