diff --git a/gvaldap/gvaldap/settings/base.py b/gvaldap/gvaldap/settings/base.py
index fa4467c..d115c34 100644
--- a/gvaldap/gvaldap/settings/base.py
+++ b/gvaldap/gvaldap/settings/base.py
@@ -294,7 +294,7 @@ CELERY_ROUTES = (
     'osusers.tasks.LdapRouter',
     'osusers.tasks.FileRouter',
 )
-CELERY_ACCEPT_CONTENT = ['yaml', 'json']
+CELERY_ACCEPT_CONTENT = ['pickle', 'yaml', 'json']
 CELERY_TASK_SERAILIZER = 'json'
 CELERY_RESULT_SERIALIZER = 'json'
 ########## END CELERY CONFIGURATION