diff --git a/agentverse/llms/openai.py b/agentverse/llms/openai.py
index 881ec3f7..b4d529ab 100644
--- a/agentverse/llms/openai.py
+++ b/agentverse/llms/openai.py
@@ -209,7 +209,7 @@ def send_token_limit(self, model: str) -> int:
     #         exception_types=(OpenAIError, json.decoder.JSONDecodeError, Exception)
     #     ),
     # )
-    def generate_response(
+    async def generate_response(
         self,
         prepend_prompt: str = "",
         history: List[dict] = [],