diff --git a/apps/knowledge/serializers/knowledge.py b/apps/knowledge/serializers/knowledge.py
index 65a1b3625..d43a27531 100644
--- a/apps/knowledge/serializers/knowledge.py
+++ b/apps/knowledge/serializers/knowledge.py
@@ -290,6 +290,10 @@ class KnowledgeSerializer(serializers.Serializer):
                 knowledge.desc = instance.get("desc")
             if 'meta' in instance:
                 knowledge.meta = instance.get('meta')
+            if 'file_size_limit' in instance:
+                knowledge.file_size_limit = instance.get('file_size_limit')
+            if 'file_count_limit' in instance:
+                knowledge.file_count_limit = instance.get('file_count_limit')
             if 'application_id_list' in instance and instance.get('application_id_list') is not None:
                 application_id_list = instance.get('application_id_list')
                 # 当前用户可修改关联的知识库列表