diff --git a/package.json b/package.json
index e6e6f22..dfbb128 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
     "is-stream": "1.0.1"
   },
   "devDependencies": {
-    "mocha": "^3.4.2",
+    "mocha": "^4.0.0",
     "jshint": "2.x.x",
     "travis-cov": "0.x.x",
     "blanket": "1.x.x",