diff --git a/app/Models/User.php b/app/Models/User.php
index 2ac1872..c1911b1 100644
--- a/app/Models/User.php
+++ b/app/Models/User.php
@@ -88,8 +88,9 @@ class User extends Authenticatable
     protected function headface(): Attribute
     {
         return Attribute::make(
-            get: fn () => $this->usersf ?: '1.gif',
-            set: fn (string $value) => ['usersf' => $value],
+            // 自动将后缀转小写，兼容数据库中的 .GIF 大写存量
+            get: fn () => strtolower($this->usersf ?: '1.gif'),
+            set: fn (string $value) => ['usersf' => strtolower($value)],
         );
     }