diff --git a/HTML5Test/notification/package.json b/HTML5Test/notification/package.json
index 4b640f7..f0279a5 100644
--- a/HTML5Test/notification/package.json
+++ b/HTML5Test/notification/package.json
@@ -57,7 +57,7 @@
     "content-disposition": "^0.5.2",
     "content-type": "^1.0.4",
     "cookies": "^0.7.1",
-    "debug": "^3.1.0",
+    "debug": "^4.0.0",
     "deep-equal": "^1.0.1",
     "delegates": "^1.0.0",
     "depd": "^1.1.1",