diff --git a/megacom/__init__.py b/megacom/__init__.py
index 8663f0a..ca39941 100644
--- a/megacom/__init__.py
+++ b/megacom/__init__.py
@@ -203,8 +203,11 @@ async def megacom_main(stdin: asyncio.StreamReader, stdout: asyncio.StreamWriter
     elif handle_done(serial_to_stdout):
         pass
 
+    time_to_exit.cancel()
     stdin_to_serial.cancel()
     serial_to_stdout.cancel()
+    with contextlib.suppress(asyncio.CancelledError):
+        await time_to_exit
     with contextlib.suppress(asyncio.CancelledError):
         with contextlib.suppress(serial.SerialException):
             await stdin_to_serial