diff --git a/src/navigator_data_ingest/base/types.py b/src/navigator_data_ingest/base/types.py
index ebb5f34..8f0006c 100644
--- a/src/navigator_data_ingest/base/types.py
+++ b/src/navigator_data_ingest/base/types.py
@@ -191,8 +191,8 @@ def __init__(self, content_type: str):
 class Update(BaseModel):
     """Class describing the results of comparing csv data against the db data to identify updates."""
 
+    s3_value: Optional[Union[str, datetime]]
     db_value: Union[str, datetime]
-    s3_value: Union[str, datetime]
     type: UpdateTypes