diff --git a/package.json b/package.json
index 68f3516..1489b19 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
   },
   "devDependencies": {
     "istanbul": "0.3.2",
-    "mocha": "~1.21.4"
+    "mocha": "~2.0.0"
   },
   "engines": {
     "node": ">= 0.8"