diff --git a/celery-stubs/app/task.pyi b/celery-stubs/app/task.pyi
index 739ab1f..ff2dd48 100644
--- a/celery-stubs/app/task.pyi
+++ b/celery-stubs/app/task.pyi
@@ -209,7 +209,7 @@ class Task(Generic[_P, _R]):
         self, args: tuple[Any, ...] | None = ..., *starargs: Any, **starkwargs: Any
     ) -> Signature[_R]: ...
     def s(self, *args: Any, **kwargs: Any) -> Signature[_R]: ...
-    def si(self, *args: Any, **kwargs: Any) -> Signature[_R]: ...
+    def si(self, *args: _P.args, **kwargs: _P.kwargs) -> Signature[_R]: ...
     def chunks(self, it: Iterable[Any], n: int) -> canvas.chunks: ...
     def map(self, it: Iterable[Any]) -> xmap: ...
     def starmap(self, it: Iterable[Any]) -> xstarmap: ...