diff --git a/requirements.txt b/requirements.txt
index 2acc9ac..7568974 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,4 +4,4 @@ pytest-asyncio==0.20.3
 uvicorn==0.20.0
 pydantic~=2.2.0
 line-bot-sdk==1.8.0
-openai==0.27.0
+openai==0.28.0