diff --git a/index.js b/index.js
index 7fd5bde..9a45b63 100644
--- a/index.js
+++ b/index.js
@@ -1,4 +1,4 @@
 'use strict';
 
 var lib = require('./lib/app-root-path.js');
-module.exports = lib(__dirname);
\ No newline at end of file
+module.exports = lib(process.env.APP_ROOT_PATH || __dirname);