diff --git a/app/core/wecomclient.py b/app/core/wecomclient.py
index fad40cb..932cdc4 100644
--- a/app/core/wecomclient.py
+++ b/app/core/wecomclient.py
@@ -74,11 +74,11 @@ class WecomClient:
     async def unionid_to_external_userid(self, unionid: str, openid: str) -> Optional[str]:
         """根据unionid获取external_userid"""
         try:
-            url = f"https://qyapi.weixin.qq.com/cgi-bin/idconvert/unionid_to_external_userid?access_token={await self.get_access_token()}"
+            url = f"https://qyapi.weixin.qq.com/cgi-bin/corpgroup/unionid_to_external_userid?access_token={await self.get_access_token()}"
             params = {
                 "unionid": unionid,
                 "openid": openid,
-                "subject_type": 1
+                "corpid": self.corp_id
             }
             
             async with aiohttp.ClientSession() as session: