diff --git a/acacore/siegfried/siegfried.py b/acacore/siegfried/siegfried.py
index e9ec841..21c0a3c 100644
--- a/acacore/siegfried/siegfried.py
+++ b/acacore/siegfried/siegfried.py
@@ -141,7 +141,7 @@ def sort_tuple(self) -> tuple[int, int, int, int, int]:
     # noinspection PyNestedDecorators
     @model_validator(mode="before")
     @classmethod
-    def unknown_id(cls, data: dict | object):
+    def unknown_id(cls, data: object):
         if isinstance(data, dict):
             return {
                 **data,