diff --git a/lib/guard/jasmine-headless-webkit.rb b/lib/guard/jasmine-headless-webkit.rb
index 01d0807..6f01064 100644
--- a/lib/guard/jasmine-headless-webkit.rb
+++ b/lib/guard/jasmine-headless-webkit.rb
@@ -1,6 +1,7 @@
 require 'guard'
 require 'guard/guard'
 require 'guard/jasmine-headless-webkit/runner'
+require 'coffee-script'
 
 module Guard
   class JasmineHeadlessWebkit < Guard