diff --git a/package.json b/package.json
index 4372c37..cbf837f 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "grunt-mocha-cli": "~2.0.0",
     "grunt": "~0.4.4",
     "grunt-contrib-jshint": "~0.11.3",
-    "grunt-mocha-istanbul": "^3.0.1",
+    "grunt-mocha-istanbul": "^4.0.0",
     "coveralls": "^2.11.4"
   },
   "peerDependencies": {