diff --git a/package.json b/package.json
index fa6f258..0aab911 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "bluebird": "^3.0.5",
     "body-parser": "~1.13.2",
     "cookie-parser": "~1.3.5",
-    "debug": "~2.2.0",
+    "debug": "~4.1.1",
     "ejs": "~2.3.3",
     "express": "~4.13.1",
     "gulp": "^4.0.2",