diff --git a/app.js b/app.js
index f231134..06ecf20 100644
--- a/app.js
+++ b/app.js
@@ -20,6 +20,8 @@ const passport = require('passport');
 const mqtt = require('mqtt');
 /* */
 const config = require('./config');
+config.notification = config.notification || [];
+
 const Device = require('./device');
 
 /* */