diff --git a/package.json b/package.json
index ac038d3..eda1ff1 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "chai": "^4.1.0",
     "coveralls": "^2.11.16",
     "cross-env": "^3.1.4",
-    "mocha": "^3.2.0",
+    "mocha": "^4.0.0",
     "nyc": "^11.1.0",
     "pmock": "^0.2.3",
     "standard": "^9.0.2",