diff --git a/fastdeploy/entrypoints/openai/protocol.py b/fastdeploy/entrypoints/openai/protocol.py
index f8cd70bca0..09c8cae0c1 100644
--- a/fastdeploy/entrypoints/openai/protocol.py
+++ b/fastdeploy/entrypoints/openai/protocol.py
@@ -229,6 +229,7 @@ class FunctionDefinition(BaseModel):
     name: str
     description: Optional[str] = None
     parameters: Optional[dict[str, Any]] = None
+    strict: Optional[bool] = None
 
 
 class ChatCompletionToolsParam(BaseModel):