diff --git a/unipay/providers/wechat.py b/unipay/providers/wechat.py
index b99b4e8..7f01ee3 100644
--- a/unipay/providers/wechat.py
+++ b/unipay/providers/wechat.py
@@ -174,8 +174,8 @@ class WechatGateway(Gateway):
 					"Content-Type": "application/json"
 				}) as resp:
 					ret = await resp.json()
-					url = ret.get("h5_url")
-					if url is None:
+					returl = ret.get("h5_url")
+					if returl is None:
 						e = Exception(f'{ret=} error')
 						raise e
 					return ret.get("h5_url")