diff --git a/package.json b/package.json
index a7485b6..3092828 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
     "pad": "0.0.5"
   },
   "devDependencies": {
+    "coffee-script": "^1.7.1",
     "mocha": "^1.21.4",
     "should": "^4.0.4"
   },