diff --git a/Gemfile b/Gemfile
index a71feec..a0ec840 100644
--- a/Gemfile
+++ b/Gemfile
@@ -21,6 +21,7 @@ end
 # For faster file watcher updates for people using Windows
 gem "wdm", "~> 0.1.0", :platforms => [:mswin, :mingw]
 
+gem "therubyracer"
 
 #####
 # General plugins