diff --git a/django-stubs/utils/cache.pyi b/django-stubs/utils/cache.pyi
index f47d929..4a46b14 100644
--- a/django-stubs/utils/cache.pyi
+++ b/django-stubs/utils/cache.pyi
@@ -15,7 +15,7 @@ def get_conditional_response(
     last_modified: Optional[int] = ...,
     response: Optional[HttpResponse] = ...,
 ) -> Optional[HttpResponse]: ...
-def patch_response_headers(response: HttpResponseBase, cache_timeout: float = ...) -> None: ...
+def patch_response_headers(response: HttpResponseBase, cache_timeout: Optional[int] = ...) -> None: ...
 def add_never_cache_headers(response: HttpResponseBase) -> None: ...
 def patch_vary_headers(response: HttpResponseBase, newheaders: Tuple[str]) -> None: ...
 def has_vary_header(response: HttpResponse, header_query: str) -> bool: ...