diff --git a/package.json b/package.json
index 89b50db..ac0f574 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
     "bluebird": "^3.4.1",
     "body-parser": "^1.15.2",
     "coffee-script": "^1.10.0",
-    "debug": "^3.0.0",
+    "debug": "^4.1.1",
     "express": "^4.14.0",
     "fbp": "^1.5.0",
     "fbp-diff": "0.0.8",