diff --git a/bin/authenticator.js b/bin/authenticator.js
old mode 100644
new mode 100755
index 36e4591..e06d509
--- a/bin/authenticator.js
+++ b/bin/authenticator.js
@@ -1,3 +1,4 @@
+#!/usr/bin/env node
 'use strict';
 
 module.exports = require('authenticator-cli/bin/authenticator');