diff --git a/vision_agent/agent/vision_agent_coder.py b/vision_agent/agent/vision_agent_coder.py
index 05155a2e..742ce2cd 100644
--- a/vision_agent/agent/vision_agent_coder.py
+++ b/vision_agent/agent/vision_agent_coder.py
@@ -678,7 +678,7 @@ def chat_with_workflow(
         chat: List[Message],
         test_multi_plan: bool = True,
         display_visualization: bool = False,
-        customized_tool_names: List[str] = None,
+        customized_tool_names: List[str] | None = None,
     ) -> Dict[str, Any]:
         """Chat with VisionAgentCoder and return intermediate information regarding the
         task.