diff --git a/apis_ontology/apps.py b/apis_ontology/apps.py
index 16d9717..6c802bd 100644
--- a/apis_ontology/apps.py
+++ b/apis_ontology/apps.py
@@ -6,4 +6,4 @@ class ApisOntologyConfig(AppConfig):
     name = "apis_ontology"
 
     def ready(self):
-        from . import signals
+        from . import signals  # noqa: F401
diff --git a/apis_ontology/management/commands/02_import_relations.py b/apis_ontology/management/commands/02_import_relations.py
index 0491d90..5df8b45 100644
--- a/apis_ontology/management/commands/02_import_relations.py
+++ b/apis_ontology/management/commands/02_import_relations.py
@@ -118,7 +118,7 @@ def import_relations():
         if username:
             user_cache[username], _ = User.objects.get_or_create(username=username)
 
-    l = len(relations)
+    l = len(relations) # noqa: E741
     p = 0
 
     for id, relation in relations.items():
diff --git a/apis_ontology/settings.py b/apis_ontology/settings.py
index ee0f27f..990e950 100644
--- a/apis_ontology/settings.py
+++ b/apis_ontology/settings.py
@@ -1,8 +1,8 @@
-from apis_acdhch_default_settings.settings import *
+from apis_acdhch_default_settings.settings import * # noqa: F403
 
 DEBUG = True
 
-INSTALLED_APPS += [
+INSTALLED_APPS += [ # noqa: F405
     "apis_highlighter",
     "django.contrib.postgres",
     "apis_core.collections",
@@ -47,7 +47,7 @@
 
 LANGUAGE_CODE = "de"
 
-MIDDLEWARE += [
+MIDDLEWARE += [ # noqa: F405
     "auditlog.middleware.AuditlogMiddleware",
     "simple_history.middleware.HistoryRequestMiddleware",
 ]
diff --git a/apis_ontology/tables.py b/apis_ontology/tables.py
index 59d0350..8ea532f 100644
--- a/apis_ontology/tables.py
+++ b/apis_ontology/tables.py
@@ -1,6 +1,5 @@
 import django_tables2 as tables
 from apis_core.apis_entities.tables import AbstractEntityTable
-from django_tables2.utils import A
 from .models import Person