diff --git a/package.json b/package.json
index 87441d7..c6a91e0 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
     "istanbul": "^0.4.5",
     "jsdom": "^9.8.3",
     "jsdom-global": "^2.1.0",
-    "mocha": "^3.1.2",
+    "mocha": "^4.0.0",
     "react": "^15.3.0",
     "react-dom": "^15.3.0",
     "sinon": "^2.0.0",