diff --git a/switchbot/devices/lock.py b/switchbot/devices/lock.py
index 75a95b4e..229f6f46 100644
--- a/switchbot/devices/lock.py
+++ b/switchbot/devices/lock.py
@@ -193,7 +193,10 @@ async def _lock_unlock(
         # Also update the battery and firmware version
         if basic_data := await self._get_basic_info():
             self._last_full_update = time.monotonic()
-            self._update_parsed_data(self._parse_basic_data(basic_data))
+            if len(basic_data) >= 3:
+                self._update_parsed_data(self._parse_basic_data(basic_data))
+            else:
+                _LOGGER.warning("Invalid basic data received: %s", basic_data)
             self._fire_callbacks()
 
         return status