diff --git a/package.json b/package.json
index 2642501..4c906b3 100644
--- a/package.json
+++ b/package.json
@@ -18,6 +18,6 @@
     "debug": "node ./node_modules/mocha/bin/mocha --debug-brk --reporter spec --full-trace"
   },
   "devDependencies": {
-    "mocha": "~3.2.0"
+    "mocha": "~4.0.1"
   }
 }