diff --git a/src/Pingpong/Admin/Seeders/PermissionsTableSeeder.php b/src/Pingpong/Admin/Seeders/PermissionsTableSeeder.php
index 499e7a2..37d5a1d 100644
--- a/src/Pingpong/Admin/Seeders/PermissionsTableSeeder.php
+++ b/src/Pingpong/Admin/Seeders/PermissionsTableSeeder.php
@@ -27,7 +27,7 @@ public function run()
             ]);
         }
 
-        $permissions = Permission::lists('id');
+        $permissions = Permission::lists('id')->toArray();
 
         Role::find(1)->permissions()->attach($permissions);
     }