diff --git a/node_modules/estraverse/package.json b/node_modules/estraverse/package.json
index 17849599f7..50f0400647 100644
--- a/node_modules/estraverse/package.json
+++ b/node_modules/estraverse/package.json
@@ -29,7 +29,7 @@
     "gulp-git": "^1.0.1",
     "gulp-tag-version": "^1.3.0",
     "jshint": "^2.5.6",
-    "mocha": "^2.1.0"
+    "mocha": "^4.0.0"
   },
   "license": "BSD-2-Clause",
   "scripts": {