diff --git a/matrix_appservice_kakaotalk/user.py b/matrix_appservice_kakaotalk/user.py
index c7b7912..8e11c35 100644
--- a/matrix_appservice_kakaotalk/user.py
+++ b/matrix_appservice_kakaotalk/user.py
@@ -749,7 +749,10 @@ class User(DBUser, BaseUser):
                 reason_suffix = "To reconnect, use the `sync` command."
             else:
                 reason_suffix = "You are now logged out. To log back in, use the `login` command."
-            await self.send_bridge_notice(f"Disconnected from KakaoTalk: {reason_str} {reason_suffix}")
+            await self.send_bridge_notice(
+                f"Disconnected from KakaoTalk: {reason_str} {reason_suffix}",
+                important=True,
+            )
 
     async def on_error(self, error: JSON) -> None:
         await self.send_bridge_notice(