diff --git a/package.json b/package.json
index 56c8f22..d8c0ac3 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "eslint": "^4.7.2",
     "eslint-config-airbnb-base": "^12.0.0",
     "eslint-plugin-import": "^2.7.0",
-    "mocha": "^3.5.3",
+    "mocha": "^4.0.0",
     "nyc": "^11.2.1"
   },
   "nyc": {