diff --git a/controllers/InstallController.php b/controllers/InstallController.php
index bf520c7..3e04f08 100644
--- a/controllers/InstallController.php
+++ b/controllers/InstallController.php
@@ -61,8 +61,8 @@ public function actionIndex()
 
     public function actionFinish()
     {
-        $root_password = Yii::$app->session->getFlash(InstallForm::ROOT_PASSWORD_KEY, null, true);
-        $returnRoute = Yii::$app->session->getFlash(InstallForm::RETURN_URL_KEY, null, '/admin');
+        $root_password = Yii::$app->session->getFlash(InstallForm::ROOT_PASSWORD_KEY, true);
+        $returnRoute = Yii::$app->session->getFlash(InstallForm::RETURN_URL_KEY, '/admin');
 
         if($root_password)
         {