diff --git a/shopping_client/shopping_client.py b/shopping_client/shopping_client.py
index 5eb5cba65f0156c42f7e9846190b3d458a33b7cb..82e6b20754bda6e2f806583534cbd80136af6610 100644
--- a/shopping_client/shopping_client.py
+++ b/shopping_client/shopping_client.py
@@ -4,6 +4,8 @@ import urllib.parse
 import getpass
 import pandas as pd
 
+from typing import Union, Optional
+
 
 class shopping_client: