diff --git a/payphone/bot.py b/payphone/bot.py
index 65ab2b6..73e91a9 100644
--- a/payphone/bot.py
+++ b/payphone/bot.py
@@ -124,6 +124,9 @@ class Payphone(commands.AutoShardedBot):
 
         print(f"Shard {shard_id} was resumed!")
 
+    async def on_shard_disconnect(shard_id: int) -> None:
+    self.update_heartbeat.cancel()
+
     async def get_or_fetch_channel(
         self, channel_id: int
     ) -> abc.GuildChannel | abc.PrivateChannel | discord.Thread | None: