diff --git a/main.py b/main.py
index 6c4b705ce591864b169723085d832356106a05cb..32271a1d510a054998e27aa686e636f118ba50ba 100644
--- a/main.py
+++ b/main.py
@@ -1,5 +1,6 @@
 import os
 
+from typing import Optional
 from library import *