diff --git a/app/Services/WechatPayService.php b/app/Services/WechatPayService.php
index 9067765..ccbb4b6 100644
--- a/app/Services/WechatPayService.php
+++ b/app/Services/WechatPayService.php
@@ -70,7 +70,7 @@ class WechatPayService
                 "json" => [
                     "appid" => $appid,
                     "out_bill_no" => $trade_no,
-                    "transfer_scene_id" => $scene_id,
+                    "transfer_scene_id" => (string) $scene_id,
                     "openid" => $openid,
                     "transfer_amount" => $amount,
                     "transfer_remark" => $remark,