diff --git a/package.json b/package.json
index 3701a7e..b82269f 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
   "devDependencies": {
     "assume": "1.5.0",
     "istanbul": "0.4.5",
-    "mocha": "3.5.0",
+    "mocha": "4.0.0",
     "pre-commit": "1.2.0"
   },
   "dependencies": {