diff --git a/matrix_appservice_kakaotalk/portal.py b/matrix_appservice_kakaotalk/portal.py
index a52310f..7b927f3 100644
--- a/matrix_appservice_kakaotalk/portal.py
+++ b/matrix_appservice_kakaotalk/portal.py
@@ -1092,6 +1092,9 @@ class Portal(DBPortal, BasePortal):
             # Misses should be guarded by supports_state_event, but handle this just in case
             self.log.error(f"Skipping Matrix state event {evt.event_id} of unsupported type {evt.type}")
             return
+        if not self.is_open:
+            self.log.info(f"Not bridging f{handler.action_name} change of portal for non-open channel")
+            return
         try:
             effective_sender, _ = await self.get_relay_sender(sender, f"{handler.action_name} {evt.event_id}")
             await handler.apply(self, effective_sender, evt.prev_content, evt.content)