diff --git a/modbus/client-serial-modbus.py b/modbus/client-serial-modbus.py
index 8a077ea..08f2091 100644
--- a/modbus/client-serial-modbus.py
+++ b/modbus/client-serial-modbus.py
@@ -10,7 +10,6 @@ import json
 import argparse
 import time
 from socket import *
-from threading import Timer
 
 import logger
 from pymodbus.client.sync import ModbusSerialClient