diff --git a/pymodbus/transport/transport_serial.py b/pymodbus/transport/transport_serial.py
index 1b53d319c..9a42fe372 100644
--- a/pymodbus/transport/transport_serial.py
+++ b/pymodbus/transport/transport_serial.py
@@ -2,7 +2,7 @@
 import asyncio
 import contextlib
 import os
-from typing import Tuple, List
+from typing import List, Tuple
 
 
 with contextlib.suppress(ImportError):