diff --git a/petercat_utils/rag_helper/git_doc_task.py b/petercat_utils/rag_helper/git_doc_task.py
index b3133bc1..7befb8fd 100644
--- a/petercat_utils/rag_helper/git_doc_task.py
+++ b/petercat_utils/rag_helper/git_doc_task.py
@@ -93,7 +93,7 @@ def handle_tree_node(self):
 
         task_list = list(
             filter(
-                lambda item: item["path"].endswith(".md") or item["node_type"] == "tree",
+                lambda item: item["path"].endswith(".md") or item["node_type"] == GitDocTaskNodeType.TREE.value,
                 map(
                     lambda item: {
                         "repo_name": self.repo_name,
diff --git a/pyproject.toml b/pyproject.toml
index 369a4561..808ee806 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "petercat_utils"
-version = "0.1.27"
+version = "0.1.28"
 description = ""
 authors = ["raoha.rh <raohai.rh@antgroup.com>"]
 readme = "README.md"