diff --git a/package.json b/package.json
index ff844fb..5e2d501 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "jsx-chai": "^4.0.0",
     "mime": "^1.3.4",
     "mkdirp": "^0.5.1",
-    "mocha": "^3.2.0",
+    "mocha": "^4.0.0",
     "mocha-clean": "^1.0.0",
     "react-addons-test-utils": "^15.4.1",
     "react-hot-loader": "^1.3.0",