diff --git a/Dispatcher/Dispatcher.php b/Dispatcher/Dispatcher.php
index a38f5f81c..7866565fa 100644
--- a/Dispatcher/Dispatcher.php
+++ b/Dispatcher/Dispatcher.php
@@ -55,7 +55,7 @@ final class Dispatcher
      *
      * @since  1.0.0
      */
-    public function __construct(ApplicationAbstract $app)
+    public function __construct(ApplicationAbstract $app = null)
     {
         $this->app = $app;
     }