diff --git a/package.json b/package.json
index 11b4070..d111d3b 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
   },
   "dependencies": {
     "cookie-parser": "~1.4.4",
-    "debug": "~2.6.9",
+    "debug": "~4.3.1",
     "express": "~4.16.1",
     "http-errors": "~1.6.3",
     "jade": "~1.11.0",