diff --git a/src/openforms/translations/api/serializers.py b/src/openforms/translations/api/serializers.py
index 31749cc54f..43f5812df9 100644
--- a/src/openforms/translations/api/serializers.py
+++ b/src/openforms/translations/api/serializers.py
@@ -1,7 +1,6 @@
 from typing import cast
 
 from django.conf import settings
-from django.db.models.base import ModelBase
 from django.utils.translation import gettext_lazy as _
 
 from modeltranslation.manager import get_translatable_fields_for_model
@@ -93,7 +92,7 @@ def _get_field(self, language_code: str):
 
         parent = cast(serializers.ModelSerializer, parent)
         base = type(parent)
-        model: ModelBase = parent.Meta.model
+        model = parent.Meta.model
         # get the translatable models fields, with deterministic ordering
         _translatable_fields = get_translatable_fields_for_model(model) or []
         translatable_fields = [
diff --git a/src/openforms/utils/files.py b/src/openforms/utils/files.py
index 5ad266ca4b..c636627d15 100644
--- a/src/openforms/utils/files.py
+++ b/src/openforms/utils/files.py
@@ -7,13 +7,13 @@
 import logging
 
 from django.db import models, transaction
-from django.db.models.base import ModelBase
+from django.db.models import Model
 from django.db.models.fields.files import FieldFile
 
 logger = logging.getLogger(__name__)
 
 
-def get_file_field_names(model: ModelBase) -> list[str]:
+def get_file_field_names(model: type[Model]) -> list[str]:
     """
     Collect names of :class:`django.db.models.FileField` (& subclass) model fields.
     """