diff --git a/video-gen-api/app/services/payment.py b/video-gen-api/app/services/payment.py
index 21b5695a..2335bb88 100644
--- a/video-gen-api/app/services/payment.py
+++ b/video-gen-api/app/services/payment.py
@@ -375,6 +375,7 @@ def _get_wechat_client(
         return None
 
     try:
+        import os
         # 创建并确保微信支付证书目录存在
         wechat_cert_dir = os.path.abspath(os.path.join(
             os.path.dirname(os.path.dirname(__file__)),