diff --git a/app/Admin/Controllers/v3/BannersController.php b/app/Admin/Controllers/v3/BannersController.php
index ae7b1af..b9965a9 100644
--- a/app/Admin/Controllers/v3/BannersController.php
+++ b/app/Admin/Controllers/v3/BannersController.php
@@ -26,7 +26,7 @@ class BannersController extends AdminController
                 return empty($market) ? '' : $market['name'];
             });
             $grid->column('title');
-            $grid->column('cover_url')->image(50);
+            $grid->column('cover_url')->image('',100);
             $grid->column('cover_type_text');
             $grid->column('path');
             $grid->column('path_type_text');