diff --git a/server/config/urls.py b/server/config/urls.py
index bf7bf863..1ab6159f 100644
--- a/server/config/urls.py
+++ b/server/config/urls.py
@@ -20,8 +20,8 @@ from vbv_lernwelt.core.views import (
     vue_logout,
 )
 from vbv_lernwelt.course.views import (
-    mark_course_completion,
     course_page_api_view,
+    mark_course_completion,
     request_course_completion,
 )
 from wagtail import urls as wagtail_urls
diff --git a/server/vbv_lernwelt/competence/serializers.py b/server/vbv_lernwelt/competence/serializers.py
index a50eb387..8fb287bd 100644
--- a/server/vbv_lernwelt/competence/serializers.py
+++ b/server/vbv_lernwelt/competence/serializers.py
@@ -1,10 +1,8 @@
 from rest_framework import serializers
 
 from vbv_lernwelt.competence.models import PerformanceCriteria
-from vbv_lernwelt.course.serializers import (
-    CourseCategorySerializer,
-)
 from vbv_lernwelt.course.serializer_helpers import get_course_serializer_class
+from vbv_lernwelt.course.serializers import CourseCategorySerializer
 
 
 class PerformanceCriteriaSerializer(
diff --git a/server/vbv_lernwelt/course/migrations/0002_auto_20221014_0933.py b/server/vbv_lernwelt/course/migrations/0002_auto_20221014_0933.py
index 0bdb9a5f..ebddd71c 100644
--- a/server/vbv_lernwelt/course/migrations/0002_auto_20221014_0933.py
+++ b/server/vbv_lernwelt/course/migrations/0002_auto_20221014_0933.py
@@ -1,43 +1,79 @@
 # Generated by Django 3.2.13 on 2022-10-14 07:33
 
+import django.db.models.deletion
 from django.conf import settings
 from django.db import migrations, models
-import django.db.models.deletion
 
 
 class Migration(migrations.Migration):
 
     dependencies = [
         migrations.swappable_dependency(settings.AUTH_USER_MODEL),
-        ('course', '0001_initial'),
+        ("course", "0001_initial"),
     ]
 
     operations = [
         migrations.CreateModel(
-            name='CourseSession',
+            name="CourseSession",
             fields=[
-                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('created_at', models.DateTimeField(auto_now_add=True)),
-                ('updated_at', models.DateTimeField(auto_now=True)),
-                ('title', models.TextField()),
-                ('start_date', models.DateField(blank=True, null=True)),
-                ('end_date', models.DateField(blank=True, null=True)),
-                ('additional_json_data', models.JSONField(default=dict)),
-                ('course', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='course.course')),
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("created_at", models.DateTimeField(auto_now_add=True)),
+                ("updated_at", models.DateTimeField(auto_now=True)),
+                ("title", models.TextField()),
+                ("start_date", models.DateField(blank=True, null=True)),
+                ("end_date", models.DateField(blank=True, null=True)),
+                ("additional_json_data", models.JSONField(default=dict)),
+                (
+                    "course",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE, to="course.course"
+                    ),
+                ),
             ],
         ),
         migrations.CreateModel(
-            name='CourseSessionUser',
+            name="CourseSessionUser",
             fields=[
-                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
-                ('created_at', models.DateTimeField(auto_now_add=True)),
-                ('updated_at', models.DateTimeField(auto_now=True)),
-                ('course_session', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='course.coursesession')),
-                ('user', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("created_at", models.DateTimeField(auto_now_add=True)),
+                ("updated_at", models.DateTimeField(auto_now=True)),
+                (
+                    "course_session",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        to="course.coursesession",
+                    ),
+                ),
+                (
+                    "user",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        to=settings.AUTH_USER_MODEL,
+                    ),
+                ),
             ],
         ),
         migrations.AddConstraint(
-            model_name='coursesessionuser',
-            constraint=models.UniqueConstraint(fields=('course_session', 'user'), name='course_session_user_unique_course_session_user'),
+            model_name="coursesessionuser",
+            constraint=models.UniqueConstraint(
+                fields=("course_session", "user"),
+                name="course_session_user_unique_course_session_user",
+            ),
         ),
     ]
diff --git a/server/vbv_lernwelt/course/models.py b/server/vbv_lernwelt/course/models.py
index daffc51e..fa4f55fd 100644
--- a/server/vbv_lernwelt/course/models.py
+++ b/server/vbv_lernwelt/course/models.py
@@ -59,8 +59,7 @@ class CourseBasePage(Page):
         course_parent_page = self.get_course_parent()
 
         if course_parent_page:
-            from vbv_lernwelt.learnpath.models import LearningPath
-            from vbv_lernwelt.learnpath.models import Circle
+            from vbv_lernwelt.learnpath.models import Circle, LearningPath
 
             circles = (
                 course_parent_page.get_children()
diff --git a/server/vbv_lernwelt/course/serializer_helpers.py b/server/vbv_lernwelt/course/serializer_helpers.py
index 6ba4c494..a188f7f3 100644
--- a/server/vbv_lernwelt/course/serializer_helpers.py
+++ b/server/vbv_lernwelt/course/serializer_helpers.py
@@ -1,7 +1,9 @@
 from rest_framework.fields import SerializerMethodField
 
-from vbv_lernwelt.core.serializer_helpers import ItWagtailBaseSerializer, \
-    get_it_serializer_class
+from vbv_lernwelt.core.serializer_helpers import (
+    get_it_serializer_class,
+    ItWagtailBaseSerializer,
+)
 
 
 class CourseBaseSerializer(ItWagtailBaseSerializer):
diff --git a/server/vbv_lernwelt/course/serializers.py b/server/vbv_lernwelt/course/serializers.py
index 869b04c0..49bf8b6d 100644
--- a/server/vbv_lernwelt/course/serializers.py
+++ b/server/vbv_lernwelt/course/serializers.py
@@ -1,10 +1,6 @@
 from rest_framework import serializers
 
-from vbv_lernwelt.course.models import (
-    Course,
-    CourseCategory,
-    CourseCompletion,
-)
+from vbv_lernwelt.course.models import Course, CourseCategory, CourseCompletion
 
 
 class CourseSerializer(serializers.ModelSerializer):
diff --git a/server/vbv_lernwelt/learnpath/models.py b/server/vbv_lernwelt/learnpath/models.py
index 876be769..8a57f875 100644
--- a/server/vbv_lernwelt/learnpath/models.py
+++ b/server/vbv_lernwelt/learnpath/models.py
@@ -8,7 +8,7 @@ from wagtail.images.blocks import ImageChooserBlock
 from wagtail.models import Page
 
 from vbv_lernwelt.core.model_utils import find_available_slug
-from vbv_lernwelt.course.models import CoursePage, CourseBasePage
+from vbv_lernwelt.course.models import CourseBasePage, CoursePage
 from vbv_lernwelt.learnpath.models_learning_unit_content import (
     AssignmentBlock,
     BookBlock,