diff --git a/package.json b/package.json
index df42669..7d74182 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "codecov": "^2.0.0",
     "docdash": "web-build-hub/docdash",
     "eslint": "^3.16.1",
-    "mocha": "^3.2.0",
+    "mocha": "^4.0.0",
     "nyc": "^10.0.0",
     "proxyquire": "1.8.0",
     "rewire": "^2.5.2",