diff --git a/app/index.js b/app/index.js
index 67ee6627..698108f1 100644
--- a/app/index.js
+++ b/app/index.js
@@ -8,8 +8,8 @@
  *
  */
 
-var config = require('./server/app').config
-var server = require('./server/app').server
+const config = require('./server/app').config
+const server = require('./server/app').server
 
 server.listen({ host: config.listen.ip, port: config.listen.port })