diff --git a/src/JonnyW/PhantomJs/DependencyInjection/ServiceContainer.php b/src/JonnyW/PhantomJs/DependencyInjection/ServiceContainer.php
index 1b4d586..cf7a3a6 100644
--- a/src/JonnyW/PhantomJs/DependencyInjection/ServiceContainer.php
+++ b/src/JonnyW/PhantomJs/DependencyInjection/ServiceContainer.php
@@ -50,7 +50,7 @@ public static function getInstance()
      * @access public
      * @return void
      */
-    public function load()
+    public function load($file=null)
     {
         $loader = new YamlFileLoader($this, new FileLocator(__DIR__.'/../Resources/config'));
         $loader->load('config.yml');