diff --git a/package.json b/package.json
index dfe7ea1..e669715 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "chai": "^4.0.2",
     "coveralls": "^3.0.0",
     "istanbul": "^0.4.5",
-    "mocha": "^3.0.2",
+    "mocha": "^4.0.0",
     "webpack": "^3.0.0"
   },
   "dependencies": {