diff --git a/src/agent.py b/src/agent.py
index 0e229fc..4fd415b 100644
--- a/src/agent.py
+++ b/src/agent.py
@@ -132,4 +132,4 @@ TOOLS AVAILABLE:
     
     agent = create_react_agent(llm, tools)
     result = _invoke_with_retry(agent, [("system", system_prompt), ("user", user_request)])
-    return result["messages"][-1].content
+    return str(result["messages"][-1].content)