diff --git a/.stats.yml b/.stats.yml
index 23a80646b..8a797e552 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,2 +1,2 @@
 configured_endpoints: 1256
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/cloudflare%2Fcloudflare-3ef67d6f67b25546d096188d487750c4f93a8fe91cea032da7eea0b1fae24e00.yml
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/cloudflare%2Fcloudflare-ba6989e092ceb9b2700a5005e1b79d3de9fb5a8abf6d73406bece08a7662171c.yml
diff --git a/src/cloudflare/_base_client.py b/src/cloudflare/_base_client.py
index 261565626..ac63cf2cd 100644
--- a/src/cloudflare/_base_client.py
+++ b/src/cloudflare/_base_client.py
@@ -879,9 +879,9 @@ class SyncAPIClient(BaseClient[httpx.Client, Stream[Any]]):
     def _prepare_options(
         self,
         options: FinalRequestOptions,  # noqa: ARG002
-    ) -> None:
+    ) -> FinalRequestOptions:
         """Hook for mutating the given options"""
-        return None
+        return options
 
     def _prepare_request(
         self,
@@ -961,7 +961,7 @@ class SyncAPIClient(BaseClient[httpx.Client, Stream[Any]]):
         input_options = model_copy(options)
 
         cast_to = self._maybe_override_cast_to(cast_to, options)
-        self._prepare_options(options)
+        options = self._prepare_options(options)
 
         retries = self._remaining_retries(remaining_retries, options)
         request = self._build_request(options)
@@ -1442,9 +1442,9 @@ class AsyncAPIClient(BaseClient[httpx.AsyncClient, AsyncStream[Any]]):
     async def _prepare_options(
         self,
         options: FinalRequestOptions,  # noqa: ARG002
-    ) -> None:
+    ) -> FinalRequestOptions:
         """Hook for mutating the given options"""
-        return None
+        return options
 
     async def _prepare_request(
         self,
@@ -1529,7 +1529,7 @@ class AsyncAPIClient(BaseClient[httpx.AsyncClient, AsyncStream[Any]]):
         input_options = model_copy(options)
 
         cast_to = self._maybe_override_cast_to(cast_to, options)
-        await self._prepare_options(options)
+        options = await self._prepare_options(options)
 
         retries = self._remaining_retries(remaining_retries, options)
         request = self._build_request(options)
diff --git a/src/cloudflare/_compat.py b/src/cloudflare/_compat.py
index 74c7639b4..c919b5adb 100644
--- a/src/cloudflare/_compat.py
+++ b/src/cloudflare/_compat.py
@@ -118,10 +118,10 @@ def get_model_fields(model: type[pydantic.BaseModel]) -> dict[str, FieldInfo]:
     return model.__fields__  # type: ignore
 
 
-def model_copy(model: _ModelT) -> _ModelT:
+def model_copy(model: _ModelT, *, deep: bool = False) -> _ModelT:
     if PYDANTIC_V2:
-        return model.model_copy()
-    return model.copy()  # type: ignore
+        return model.model_copy(deep=deep)
+    return model.copy(deep=deep)  # type: ignore
 
 
 def model_json(model: pydantic.BaseModel, *, indent: int | None = None) -> str: