diff --git a/package.json b/package.json
index c15b250..4c5b704 100644
--- a/package.json
+++ b/package.json
@@ -22,6 +22,6 @@
   },
   "license": "MIT",
   "devDependencies": {
-    "mocha": "~1.13.0"
+    "mocha": "~2.4.1"
   }
 }