diff --git a/package.json b/package.json
index ab39f54..08e7928 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
     "body-parser": "^1.15.2",
     "compression": "^1.6.2",
     "cookie-parser": "~1.4.3",
-    "debug": "~2.2.0",
+    "debug": "~4.1.1",
     "ejs": "~2.5.5",
     "express": "^4.13.4",
     "morgan": "~1.7.0",