diff --git a/python/tasks/tiktok/celery.py b/python/tasks/tiktok/celery.py
index 50746e4..7a21704 100644
--- a/python/tasks/tiktok/celery.py
+++ b/python/tasks/tiktok/celery.py
@@ -1,15 +1,19 @@
 from .config import tiktok_config
+from .utils import kombu_register_json_dataclass
 
 import celery
 import redis
 
 c = tiktok_config()
 
+kombu_register_json_dataclass()
+
 app = celery.Celery(
     __name__,
     broker=c.celery_broker,
     result_backend=c.celery_result_backend,
-    accept_content=['pickle'],
+    accept_content=['json-dataclass', 'json',],
+    task_serializer='json-dataclass',
 )
 
 app.autodiscover_tasks(c.celery_imports)
diff --git a/python/tasks/tiktok/utils.py b/python/tasks/tiktok/utils.py
index 191633a..a81f043 100644
--- a/python/tasks/tiktok/utils.py
+++ b/python/tasks/tiktok/utils.py
@@ -1,16 +1,14 @@
 import celery.app.task
 import importlib
-import kombu.serialization
 import kombu.utils.json
 from typing import (
     Any,
 )
 
-
 class Task(celery.app.task.Task):
     def __call__(self, *args, **kwargs):
         res = super().__call__(*args, **kwargs)
-        return self._to_native(res)
+        return self._dumps(res)
 
     @classmethod
     def _loads(self, data_str: str) -> Any:
@@ -42,10 +40,12 @@ class Task(celery.app.task.Task):
         else:
             return kombu.utils.json.dumps(data)
 
-kombu.serialization.register(
-    'json-dataclass',
-    Task._dumps,
-    Task._loads,
-    content_type='application/json',
-    content_encoding='text',
-)
+def kombu_register_json_dataclass():
+    import kombu.serialization
+    kombu.serialization.register(
+        'json-dataclass',
+        Task._dumps,
+        Task._loads,
+        content_type='application/json',
+        content_encoding='text',
+    )