diff --git a/package.json b/package.json
index f7a8dd9..8b75259 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
     "jshint": "*",
     "koa": "~0.6.0",
     "koa-middlewares": "~0.1.3",
-    "mocha": "*",
+    "mocha": "2.4.1",
     "should": "~3.3.1",
     "speeds": "~0.0.1"
   }