diff --git a/src/Model.php b/src/Model.php
index c4fb4cc..b06dda1 100644
--- a/src/Model.php
+++ b/src/Model.php
@@ -43,6 +43,8 @@ abstract class Model extends HyperfModel implements CacheableInterface
         'deleted_at',
     ];
 
+    protected array $append = [];
+
     /**
      * 排序配置：
      * - false: 禁用排序