diff --git a/development.ini b/development.ini
--- a/development.ini
+++ b/development.ini
@@ -256,9 +256,10 @@ use_celery = false
 broker.url = amqp://rabbitmq:qewqew@localhost:5672/rabbitmqhost
 
 celery.imports = kallithea.lib.celerylib.tasks
-celery.accept.content = pickle
+celery.accept.content = json
 celery.result.backend = amqp://
 celery.result.serializer = json
+celery.task.serializer = json
 
 #celery.send.task.error.emails = true
 #celery.amqp.task.result.expires = 18000