diff --git a/src/_bentoml_sdk/_pydantic.py b/src/_bentoml_sdk/_pydantic.py
index 8152e868d9a..f5c39108a8d 100644
--- a/src/_bentoml_sdk/_pydantic.py
+++ b/src/_bentoml_sdk/_pydantic.py
@@ -2,7 +2,6 @@
 
 import typing as t
 
-from pydantic import GenerateSchema
 from pydantic._internal import _known_annotated_metadata
 
 from .typing_utils import get_args
@@ -195,31 +194,3 @@ def pathlib_prepare_pydantic_annotations(
     # PIL image
     pil_prepare_pydantic_annotations,
 ]
-
-
-class BentoMLPydanticGenerateSchema(GenerateSchema):
-    def _get_prepare_pydantic_annotations_for_known_type(
-        self, obj: t.Any, annotations: t.Iterable[t.Any]
-    ) -> tuple[t.Any, list[t.Any]] | None:
-        # Check for hashability
-        try:
-            hash(obj)
-        except TypeError:
-            # obj is definitely not a known type if this fails
-            return None
-        # try path preparer first to override the default one
-        res = pathlib_prepare_pydantic_annotations(
-            obj, annotations, self._config_wrapper.config_dict
-        )
-        if res is not None:
-            return res
-
-        res = super()._get_prepare_pydantic_annotations_for_known_type(obj, annotations)
-        if res is not None:
-            return res
-
-        for preparer in CUSTOM_PREPARE_METHODS:
-            res = preparer(obj, annotations, self._config_wrapper.config_dict)
-            if res is not None:
-                return res
-        return None
diff --git a/src/_bentoml_sdk/io_models.py b/src/_bentoml_sdk/io_models.py
index 354ef299623..a1f42285e49 100644
--- a/src/_bentoml_sdk/io_models.py
+++ b/src/_bentoml_sdk/io_models.py
@@ -421,7 +421,7 @@ def model_dump(self, **kwargs: t.Any) -> dict[str, t.Any]:
         return super().model_dump(**kwargs)["root"]
 
     def model_dump_json(self, **kwargs: t.Any) -> str:
-        return json.dumps(self.model_dump(**kwargs))
+        return json.dumps(self.model_dump(mode="json", **kwargs))
 
     @classmethod
     def model_validate(cls, obj: t.Any, **kwargs: t.Any) -> t.Self:
diff --git a/src/bentoml/_internal/server/runner_app.py b/src/bentoml/_internal/server/runner_app.py
index 1765635d563..fe88f5c3c9b 100644
--- a/src/bentoml/_internal/server/runner_app.py
+++ b/src/bentoml/_internal/server/runner_app.py
@@ -116,7 +116,7 @@ def on_startup(self) -> list[LifecycleHook]:
 
     @property
     def on_shutdown(self) -> list[LifecycleHook]:
-        on_shutdown: list[LifecycleHook] = [self.runner.destroy]
+        on_shutdown: list[LifecycleHook] = [with_app_arg(self.runner.destroy)]
         for dispatcher in self.dispatchers.values():
             on_shutdown.append(with_app_arg(dispatcher.shutdown))
         on_shutdown.extend(super().on_shutdown)