diff --git a/example/backend/package.json b/example/backend/package.json
index 10b0619..08acdff 100644
--- a/example/backend/package.json
+++ b/example/backend/package.json
@@ -20,7 +20,7 @@
     "express": "^4.15.2",
     "express-jwt": "^5.1.0",
     "jsonwebtoken": "^7.3.0",
-    "mongoose": "^4.9.0",
+    "mongoose": "^5.7.7",
     "passport": "^0.3.2",
     "passport-twitter-token": "^1.3.0",
     "request": "^2.81.0"