diff --git a/package.json b/package.json
index 2a3b3de..b41c35f 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
     "gulp-util": "^3.0.1",
     "istanbul": "^0.4.3",
     "jsonfile": "^3.0.0",
-    "mocha": "^3.0.2",
+    "mocha": "^4.0.0",
     "mocha-lcov-reporter": "1.3.0",
     "vinyl-buffer": "1.0.0",
     "vinyl-source-stream": "^1.1.0"