diff --git a/src/backend/bisheng/api/services/assistant_agent.py b/src/backend/bisheng/api/services/assistant_agent.py
index ab75dd0ee..5646d22ed 100644
--- a/src/backend/bisheng/api/services/assistant_agent.py
+++ b/src/backend/bisheng/api/services/assistant_agent.py
@@ -381,8 +381,8 @@ async def react_run(self, query: str, chat_history: List = None, callback: Callb
             'input': query,
             'chat_history': chat_history
         }, config=RunnableConfig(callbacks=callback))
-        print(result)
+        logger.debug(f"react_run result: {result}")
         output = result['agent_outcome'].return_values['output']
         if isinstance(output, dict):
-            output = output['text']
+            output = list(output.values())[0]
         return [AIMessage(content=output)]
diff --git a/src/backend/pyproject.toml b/src/backend/pyproject.toml
index 41f0352b8..e3d851999 100644
--- a/src/backend/pyproject.toml
+++ b/src/backend/pyproject.toml
@@ -1,4 +1,3 @@
-
 [tool.poetry]
 name = "bisheng"
 version = "0.3.3"
@@ -89,7 +88,7 @@ matplotlib = "3.8.4"
 cchardet = "^2.1.7"
 llama-index = "0.9.48"
 tenacity = "<8.4.0"
-bisheng-ragas = {version = "^1.0.0", source = "dataelem-index"}
+bisheng-ragas = { version = "^1.0.0", source = "dataelem-index" }
 
 [tool.poetry.dev-dependencies]
 black = "^23.1.0"
diff --git a/src/bisheng-langchain/requirements.txt b/src/bisheng-langchain/requirements.txt
index eb940fce9..2ed808c39 100644
--- a/src/bisheng-langchain/requirements.txt
+++ b/src/bisheng-langchain/requirements.txt
@@ -10,7 +10,7 @@ pydantic==1.10.13
 pymupdf==1.23.8
 shapely==2.0.2
 filetype==1.2.0
-langgraph==0.1.5
+langgraph==0.0.50
 openai==1.14.3
 langchain-openai==0.1.0
 llama-index==0.9.48