diff --git a/src/main.py b/src/main.py
index 5bb632b..a17ecb1 100644
--- a/src/main.py
+++ b/src/main.py
@@ -1,4 +1,5 @@
 import os
+from typing import Union
 # from backend import Fill  
 from commonforms import prepare_form 
 from pypdf import PdfReader