diff --git a/src/_bentoml_impl/server/app.py b/src/_bentoml_impl/server/app.py
index 34c833bb072..d1535523a70 100644
--- a/src/_bentoml_impl/server/app.py
+++ b/src/_bentoml_impl/server/app.py
@@ -51,7 +51,7 @@ async def __call__(
     ) -> None:
         from starlette.requests import Request
 
-        if scope["type"] not in ("http", "websocket"):
+        if scope["type"] not in ("http",):
             return await self.app(scope, receive, send)
 
         req = Request(scope, receive, send)
diff --git a/src/bentoml/_internal/service/openapi/specification.py b/src/bentoml/_internal/service/openapi/specification.py
index d0e815ff2ff..8cde914bdb5 100644
--- a/src/bentoml/_internal/service/openapi/specification.py
+++ b/src/bentoml/_internal/service/openapi/specification.py
@@ -96,6 +96,7 @@ class Schema:
     maxItems: t.Optional[int] = None
     minItems: t.Optional[int] = None
     uniqueItems: t.Optional[bool] = None
+    prefixItems: t.Optional[t.List[Schema]] = None
     maxProperties: t.Optional[int] = None
     minProperties: t.Optional[int] = None
     required: t.Optional[t.List[str]] = None