diff --git a/package.json b/package.json
index 2e88dfc..e7b0865 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
     "coveralls": "*",
     "isparta": "*",
     "mocha": "*",
-    "npm-run-all": "*",
+    "npm-run-all": ">=4.1.5",
     "rimraf": "*"
   },
   "dependencies": {}