diff --git a/app.js b/app.js
index 0c66cc2..adb7f81 100644
--- a/app.js
+++ b/app.js
@@ -487,6 +487,8 @@ models.sequelize.sync().then(function () {
             if (err) throw new Error(err);
             if (!notes || notes.length <= 0) return startListen();
         });
+    } else {
+        throw new Error('server still not ready after db synced');
     }
 });