diff --git a/package.json b/package.json
index c3a191b..3cd41e0 100644
--- a/package.json
+++ b/package.json
@@ -2,5 +2,8 @@
   "scripts": {
     "start": "node server.js",
     "check:contacts": "node scripts/check-contact-messages.js"
+  },
+  "engines": {
+    "node": ">=18.0.0"
   }
 }