diff --git a/api/core/workflow/nodes/knowledge_retrieval/knowledge_retrieval_node.py b/api/core/workflow/nodes/knowledge_retrieval/knowledge_retrieval_node.py
index 62c32676ef4586..5bfdd038971291 100644
--- a/api/core/workflow/nodes/knowledge_retrieval/knowledge_retrieval_node.py
+++ b/api/core/workflow/nodes/knowledge_retrieval/knowledge_retrieval_node.py
@@ -1,4 +1,5 @@
 from typing import Any, cast
+
 from sqlalchemy import func
 
 from core.app.app_config.entities import DatasetRetrieveConfigEntity
diff --git a/api/core/workflow/nodes/llm/llm_node.py b/api/core/workflow/nodes/llm/llm_node.py
index 245dfb9dcdcd95..b1b9ba86827e4a 100644
--- a/api/core/workflow/nodes/llm/llm_node.py
+++ b/api/core/workflow/nodes/llm/llm_node.py
@@ -1,5 +1,4 @@
 import json
-
 from collections.abc import Generator
 from copy import deepcopy
 from typing import TYPE_CHECKING, Optional, cast