diff --git a/package.json b/package.json
index 5d8080c..b749387 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
   "license": "MIT",
   "devDependencies": {
     "jshint": "^2.5.5",
-    "mocha": "^3.3.0"
+    "mocha": "^4.0.0"
   },
   "dependencies": {}
 }