diff --git a/package.json b/package.json
index e65a9d8..dd3bc1b 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
   },
   "main": "./lib/index",
   "scripts": {
-    "test": "mocha --compilers coffee:'./node_modules/coffee-script/lib/coffee-script/coffee-script'",
+    "test": "mocha --compilers coffee:'./node_modules/coffee-script/lib/coffee-script/register'",
     "prepublish": "coffee -o lib -c src"
   },
   "repository": {
@@ -28,11 +28,12 @@
     "underscore": "1.x.x"
   },
   "devDependencies": {
-    "should": "~2.0.1",
-    "mocha": "1.x.x",
+    "should": "~4.0.4",
+    "mocha": "~1.20.1",
     "sinon": "~1.7.3",
-    "coffee-script": "1.6.x",
-    "rimraf":      "2.0.x"
+    "coffee-script": "~1.7.1",
+    "rimraf": "2.0.x",
+    "fs-extra": "^0.9.1"
   },
   "engines": {
     "node": "> 0.4.1"