diff --git a/validation/from_passport.py b/validation/from_passport.py
index 6a59c3e..fd5608f 100644
--- a/validation/from_passport.py
+++ b/validation/from_passport.py
@@ -1,5 +1,5 @@
 from datetime import date
-from typing import Literal, Self
+from typing import Literal, Self, Optional
 from pydantic import BaseModel, ConfigDict, Field, model_validator