diff --git a/matrix_appservice_kakaotalk/rpc/rpc.py b/matrix_appservice_kakaotalk/rpc/rpc.py
index 0914015..59c9fcc 100644
--- a/matrix_appservice_kakaotalk/rpc/rpc.py
+++ b/matrix_appservice_kakaotalk/rpc/rpc.py
@@ -166,6 +166,8 @@ class RPCClient:
         self._on_disconnect()
 
     def _on_disconnect(self) -> None:
+        self._req_id = 0
+        self._min_broadcast_id = 0
         self._reader = None
         self._writer = None
         self._is_connected.clear()