diff --git a/sherlock_project/sherlock.py b/sherlock_project/sherlock.py
index 8ff0467..4eb06e8 100644
--- a/sherlock_project/sherlock.py
+++ b/sherlock_project/sherlock.py
@@ -24,6 +24,7 @@ import re
 from argparse import ArgumentParser, RawDescriptionHelpFormatter
 from json import loads as json_loads
 from time import monotonic
+from typing import Optional
 
 import requests
 from requests_futures.sessions import FuturesSession