diff --git a/package.json b/package.json
index 3076391..b88ca33 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "test": "make test"
   },
   "devDependencies": {
-    "mocha": "*",
+    "mocha": "2.4.5",
     "chai": "*",
     "folio": "0.2.x"
   },