diff --git a/lib/server/config.js b/lib/server/config.js
index dffa32fd..db0e52ac 100644
--- a/lib/server/config.js
+++ b/lib/server/config.js
@@ -1,4 +1,5 @@
 (function() {
+    'use strict';
     
     var DIR_SERVER  = __dirname     + '/',
         DIR_LIB     = DIR_SERVER    + '../',