diff --git a/package.json b/package.json
index 4223b86..18a2cf4 100644
--- a/package.json
+++ b/package.json
@@ -37,6 +37,6 @@
     "coveralls": "^2.11.6",
     "eslint": "^3.0.0",
     "istanbul": "^0.4.1",
-    "mocha": "^3.0.2"
+    "mocha": "^4.0.0"
   }
 }