diff --git a/sqlalchemy_file/file.py b/sqlalchemy_file/file.py
index 62d7151..c45927b 100644
--- a/sqlalchemy_file/file.py
+++ b/sqlalchemy_file/file.py
@@ -1,7 +1,7 @@
 import os.path
 import uuid
 import warnings
-from datetime import datetime
+from datetime import datetime, timezone
 from typing import Any, Dict, List, Optional
 
 from sqlalchemy_file.base import BaseFile
@@ -121,7 +121,7 @@ def save_to_storage(self, upload_storage: Optional[str] = None) -> None:
         )
         self["file_id"] = stored_file.name
         self["upload_storage"] = upload_storage
-        self["uploaded_at"] = datetime.utcnow().isoformat()
+        self["uploaded_at"] = datetime.now(timezone.utc).isoformat()
         self["path"] = f"{upload_storage}/{stored_file.name}"
         self["url"] = stored_file.get_cdn_url()
         self["saved"] = True