diff --git a/cachet_url_monitor/scheduler.py b/cachet_url_monitor/scheduler.py
index bedcaa2..5dbceee 100644
--- a/cachet_url_monitor/scheduler.py
+++ b/cachet_url_monitor/scheduler.py
@@ -3,6 +3,7 @@ import logging
 import sys
 import threading
 import time
+import os
 
 import schedule
 from yaml import load, SafeLoader