diff --git a/examples/express-imessage/package.json b/examples/express-imessage/package.json
index 3cc819a..d58589d 100644
--- a/examples/express-imessage/package.json
+++ b/examples/express-imessage/package.json
@@ -12,7 +12,7 @@
     "express-session": "^1.9.1",
     "imessage": "^0.1.5",
     "moment": "^2.8.3",
-    "mongoose": "^3.8.19",
+    "mongoose": "^5.7.7",
     "passport": "^0.2.1",
     "passport-local": "^1.0.0",
     "redis": "^0.12.1",