diff --git a/evap/evaluation/models_logging.py b/evap/evaluation/models_logging.py
index f12f988f98..f9cd00332c 100644
--- a/evap/evaluation/models_logging.py
+++ b/evap/evaluation/models_logging.py
@@ -159,14 +159,14 @@ def _get_change_data(self, action_type: InstanceActionType):
                 if created_value is not None
             }
         elif action_type == InstanceActionType.CHANGE:
-            old_dict = type(self).objects.get(pk=self.pk)._as_dict()
+            old_dict = type(self)._default_manager.get(pk=self.pk)._as_dict()
             changes = {
                 field_name: {FieldActionType.VALUE_CHANGE: [old_value, self_dict[field_name]]}
                 for field_name, old_value in old_dict.items()
                 if old_value != self_dict[field_name]
             }
         elif action_type == InstanceActionType.DELETE:
-            old_dict = type(self).objects.get(pk=self.pk)._as_dict()
+            old_dict = type(self)._default_manager.get(pk=self.pk)._as_dict()
             changes = {
                 field_name: {FieldActionType.INSTANCE_DELETE: [deleted_value]}
                 for field_name, deleted_value in old_dict.items()
diff --git a/evap/evaluation/tests/test_tools.py b/evap/evaluation/tests/test_tools.py
index b084cd6572..ee5adfa764 100644
--- a/evap/evaluation/tests/test_tools.py
+++ b/evap/evaluation/tests/test_tools.py
@@ -67,7 +67,7 @@ def test_is_prefetched(self):
         baker.make(Contribution, evaluation=evaluation)
 
         def test_logic(cls: type[Model], pk: int, field: str) -> None:
-            instance = cls.objects.get(pk=pk)
+            instance = cls._default_manager.get(pk=pk)
             self.assertFalse(is_prefetched(instance, field))
 
             prefetch_related_objects([instance], field)
@@ -76,7 +76,7 @@ def test_logic(cls: type[Model], pk: int, field: str) -> None:
             instance.refresh_from_db(fields=[field])
             self.assertFalse(is_prefetched(instance, field))
 
-            instance = cls.objects.filter(pk=instance.pk).prefetch_related(field).get()
+            instance = cls._default_manager.filter(pk=instance.pk).prefetch_related(field).get()
             self.assertTrue(is_prefetched(instance, field))
 
         test_logic(Evaluation, evaluation.pk, "contributions")  # inverse foreign key
diff --git a/evap/staff/importers/enrollment.py b/evap/staff/importers/enrollment.py
index e7e6bda190..b251ac0148 100644
--- a/evap/staff/importers/enrollment.py
+++ b/evap/staff/importers/enrollment.py
@@ -553,7 +553,7 @@ def finalize(self) -> None:
 
         existing_participation_pairs = [
             (participation.evaluation.course.name_en, participation.userprofile.email)  # type: ignore
-            for participation in Evaluation.participants.through.objects.filter(
+            for participation in Evaluation.participants.through._default_manager.filter(
                 evaluation__course__name_en__in=seen_evaluation_names, userprofile__email__in=seen_user_emails
             ).prefetch_related("userprofile", "evaluation__course")
         ]
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 8b8e8bfe35..34f0bb4c46 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,12 +2,12 @@
 black~=23.7.0
 coverage[toml]
 django-debug-toolbar~=4.0
-django-stubs~=4.2.0
+django-stubs~=4.2.4
 django-stubs-ext~=4.2.0
 django-webtest~=1.9.10
 isort~=5.12.0
 model-bakery~=1.15.0
-mypy~=1.4.1
+mypy~=1.5.1
 openpyxl-stubs~=0.1.25
 pylint-django~=2.5.3
 pylint~=2.17.1