diff --git a/Gemfile b/Gemfile
index a28dfb22ab..1fec7691d4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,4 @@
 source "http://rubygems.org"
 
 gem "github-pages"
+gem "rouge"
diff --git a/Gemfile.lock b/Gemfile.lock
index a38db7c660..c505540293 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -129,6 +129,7 @@ PLATFORMS
 
 DEPENDENCIES
   github-pages
+  rouge
 
 BUNDLED WITH
    1.11.2