diff --git a/app/wechat/service/FansService.php b/app/wechat/service/FansService.php
index f92138395..4150bb3b6 100644
--- a/app/wechat/service/FansService.php
+++ b/app/wechat/service/FansService.php
@@ -47,6 +47,7 @@ class FansService extends Service
         if ($appid !== '') $user['appid'] = $appid;
         unset($user['privilege'], $user['groupid']);
         $this->app->event->trigger('WechatFansUpdate', $user);
+        foreach ($user as $k => $v) if ($v === '') unset($user[$k]);
         return !!data_save(WechatFans::class, $user, 'openid');
     }