diff --git a/door_pi_control/bell.py b/door_pi_control/bell.py
index f0cec94..4efee00 100644
--- a/door_pi_control/bell.py
+++ b/door_pi_control/bell.py
@@ -1,7 +1,7 @@
 from . import mqtt, util
 from .util import timestamp
 import time
-
+import datetime
 import serial
 import serial.threaded
 import threading