diff --git a/drugstone/celery.py b/drugstone/celery.py
index 1dd349bfdb5588868a98a2ccc322289fb90febc7..05cf2c76731e6ae05e0617366aeff9fb65cde15d 100644
--- a/drugstone/celery.py
+++ b/drugstone/celery.py
@@ -3,8 +3,8 @@ import os
 from celery import Celery
 
 
-os.environ.setdefault("DJANGO_SETTINGS_MODULE", "drugstone.settings")
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'drugstone.settings')
 
-app = Celery("drugstone")
-app.config_from_object("django.conf:settings", namespace="CELERY")
+app = Celery('drugstone')
+app.config_from_object('django.conf:settings', namespace='CELERY')
 app.autodiscover_tasks()
diff --git a/drugstone/settings/celery_schedule.py b/drugstone/settings/celery_schedule.py
index f817c9511f74e046c65995a5add04516a884b51e..7bab2c532243d229dc4d79985e20e1495eb99ebe 100644
--- a/drugstone/settings/celery_schedule.py
+++ b/drugstone/settings/celery_schedule.py
@@ -1,8 +1,8 @@
 from celery.schedules import crontab
 
 CELERY_BEAT_SCHEDULE = {
-    "update_db": {
-        "task": "drugstone.tasks.task_update_db_from_nedrex",
-        "schedule": crontab(minute="*/1000"),
+    'update_db': {
+        'task': 'drugstone.tasks.task_update_db_from_nedrex',
+        'schedule': crontab(minute='*/1000'),
     },
 }
diff --git a/drugstone/settings/settings.py b/drugstone/settings/settings.py
index b9431332b1ada1ebe9e97a977e62c902d6c24a24..3e4ee44d27010ad160d4b2b0036f0a508aba05d5 100755
--- a/drugstone/settings/settings.py
+++ b/drugstone/settings/settings.py
@@ -166,6 +166,6 @@ CACHES = {
     }
 }
 
-CELERY_BROKER_URL = os.environ.get("CELERY_BROKER_URL")
+CELERY_BROKER_URL = os.environ.get('CELERY_BROKER_URL')
 # timezones: https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
 CELERY_TIMEZONE = 'Europe/Berlin'
diff --git a/drugstone/tasks.py b/drugstone/tasks.py
index c52aaf70056dc9e373088368f72b41749c6c7460..b3df13804602d7b7fcc7cb954cb4f2f52edc56eb 100644
--- a/drugstone/tasks.py
+++ b/drugstone/tasks.py
@@ -7,12 +7,12 @@ logger = get_task_logger(__name__)
 
 @shared_task
 def task_update_db_from_nedrex():
-    logger.info("Updating DB from NeDRex.")
+    logger.info('Updating DB from NeDRex.')
     print('here')
 
-    logger.info("Fetching data...")
+    logger.info('Fetching data...')
     fetch_nedrex_data()
 
-    logger.info("Integrating data...")
+    logger.info('Integrating data...')
     integrate_nedrex_data()
-    logger.info("Done.")
+    logger.info('Done.')
diff --git a/setup.cfg b/setup.cfg
index ba484049e7082fd869c22cbeb44c1972c54fd16b..9f22bc39c62d7081d1d47c879611057c787a7ac8 100755
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,8 +1,8 @@
 [pycodestyle]
-exclude = */migrations/*,venv,test_*,manage.py,tasks/*,*/commands/*
+exclude = */migrations/*,.env,venv,test_*,manage.py,tasks/*,*/commands/*
 max-line-length = 120
 
 [flake8]
-exclude = */migrations/*,venv,test_*,manage.py,tasks/*,*/commands/*
+exclude = */migrations/*,.env,venv,test_*,manage.py,tasks/*,*/commands/*,*/__init__.py,*/settings.py
 max-line-length = 120
 inline-quotes = '