diff --git a/gvafile/gvafile/settings/base.py b/gvafile/gvafile/settings/base.py
index fc83245..4984ea6 100644
--- a/gvafile/gvafile/settings/base.py
+++ b/gvafile/gvafile/settings/base.py
@@ -286,7 +286,9 @@ CELERY_ROUTES = (
     'gvacommon.celeryrouters.LdapRouter',
     'gvacommon.celeryrouters.FileRouter',
 )
-CELERY_ACCEPT_CONTENT = ['pickle', 'yaml', 'json']
+CELERY_TIMEZONE = 'Europe/Berlin'
+CELERY_ENABLE_UTC = True
+CELERY_ACCEPT_CONTENT = ['json']
 CELERY_TASK_SERIALIZER = 'json'
 CELERY_RESULT_SERIALIZER = 'json'
 ########## END CELERY CONFIGURATION