diff --git a/functions/package.json b/functions/package.json
index f34c34d..ad524a3 100644
--- a/functions/package.json
+++ b/functions/package.json
@@ -20,7 +20,7 @@
     "firebase-functions": "^3.3.0",
     "cookie-parser": "~1.4.4",
     "debug": "~2.6.9",
-    "express": "~4.16.1",
+    "express": "~4.17.3",
     "morgan": "~1.9.1"
   },
   "devDependencies": {