diff --git a/src/ai_powered/chat_bot.py b/src/ai_powered/chat_bot.py
index 2bc6319..5fb92e3 100644
--- a/src/ai_powered/chat_bot.py
+++ b/src/ai_powered/chat_bot.py
@@ -38,7 +38,7 @@ async def chat_continue(self) -> str:
             model = model_config.model_name,
             messages = [*self._system_prompts, *self.conversation],
             tools = self._tool_schemas,
-            tool_choice = "auto" if len(self.tools) > 0 else "none",
+            tool_choice = "auto" if len(self.tools) > 0 else openai.NOT_GIVEN,
         )
         assistant_message = response.choices[0].message