1 files changed, 1 insertions, 0 deletions

diff --git a/app.js b/app.js
index c0a14b35..95e94b0a 100644
--- a/app.js
+++ b/app.js
@@ -1,3 +1,4 @@
+'use strict'
 // app
 // external modules
 var express = require('express')