diff --git a/nanobot/channels/feishu.py b/nanobot/channels/feishu.py
index 7d75705a2..4798b818b 100644
--- a/nanobot/channels/feishu.py
+++ b/nanobot/channels/feishu.py
@@ -408,12 +408,18 @@ class FeishuChannel(BaseChannel):
 
     def _fetch_bot_open_id(self) -> str | None:
         """Fetch the bot's own open_id via GET /open-apis/bot/v3/info."""
-        from lark_oapi.api.bot.v3 import GetBotInfoRequest
         try:
-            request = GetBotInfoRequest.builder().build()
-            response = self._client.bot.v3.bot_info.get(request)
-            if response.success() and response.data and response.data.bot:
-                return getattr(response.data.bot, "open_id", None)
+            import lark_oapi as lark
+            request = lark.RawRequest.builder() \
+                .http_method(lark.HttpMethod.GET) \
+                .uri("/open-apis/bot/v3/info") \
+                .build()
+            response = self._client.request(request)
+            if response.success():
+                import json
+                data = json.loads(response.raw.content)
+                bot = (data.get("data") or data).get("bot") or data.get("bot") or {}
+                return bot.get("open_id")
             logger.warning("Failed to get bot info: code={}, msg={}", response.code, response.msg)
             return None
         except Exception as e: