diff --git a/modelscope_agent/tools/tool.py b/modelscope_agent/tools/tool.py
index 121eb7e05..0fa626698 100644
--- a/modelscope_agent/tools/tool.py
+++ b/modelscope_agent/tools/tool.py
@@ -58,7 +58,7 @@ def __init__(self, cfg={}):
         except ValidationError:
             raise ValueError(f'Error when parsing parameters of {self.name}')
 
-        self._str = self.tool_schema.json(ensure_ascii=False)
+        self._str = self.tool_schema.model_dump_json()
 
     def __call__(self, remote=False, *args, **kwargs):
         if self.is_remote_tool or remote:
diff --git a/requirements.txt b/requirements.txt
index 8f4f04615..bef530b3e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ ms-swift
 openai
 opencv-python
 Pillow
-pydantic==1.10.8
+pydantic>=2.0.0
 pytest
 python-dotenv
 soundfile