diff --git a/src/gi-stubs/repository/_Gtk4.pyi b/src/gi-stubs/repository/_Gtk4.pyi
index 562012d2..f9efe6dd 100644
--- a/src/gi-stubs/repository/_Gtk4.pyi
+++ b/src/gi-stubs/repository/_Gtk4.pyi
@@ -4246,7 +4246,8 @@ class CellArea(GObject.InitiallyUnowned, Buildable, CellLayout):
         cell_area: Gdk.Rectangle,
         flags: CellRendererState,
     ) -> int: ...
-    def find_cell_property(*args, **kwargs): ...  # FIXME Function
+    # override
+    def find_cell_property(self, property_name: str) -> GObject.ParamSpec: ...
     def focus(self, direction: DirectionType) -> bool: ...
     def foreach(
         self, callback: typing.Callable[..., bool], *callback_data: typing.Any
@@ -4300,12 +4301,16 @@ class CellArea(GObject.InitiallyUnowned, Buildable, CellLayout):
     def inner_cell_area(
         self, widget: Widget, cell_area: Gdk.Rectangle
     ) -> Gdk.Rectangle: ...
-    def install_cell_property(*args, **kwargs): ...  # FIXME Function
+    # override
+    def install_cell_property(
+        self, property_id: int, pspec: GObject.ParamSpec
+    ) -> None: ...
     def is_activatable(self) -> bool: ...
     def is_focus_sibling(
         self, renderer: CellRenderer, sibling: CellRenderer
     ) -> bool: ...
-    def list_cell_properties(*args, **kwargs): ...  # FIXME Function
+    # override
+    def list_cell_properties(self) -> list[GObject.ParamSpec]: ...  # FIXME Function
     def remove(self, renderer: CellRenderer) -> None: ...
     def remove_focus_sibling(
         self, renderer: CellRenderer, sibling: CellRenderer
@@ -33843,7 +33848,8 @@ class Widget(GObject.InitiallyUnowned, Accessible, Buildable, ConstraintTarget):
     def get_hexpand_set(self) -> bool: ...
     def get_last_child(self) -> typing.Optional[Widget]: ...
     def get_layout_manager(self) -> typing.Optional[LayoutManager]: ...
-    def get_layout_manager_type(*args, **kwargs): ...  # FIXME Function
+    # override
+    def get_layout_manager_type(self) -> typing.Type[typing.Any]: ...
     def get_limit_events(self) -> bool: ...
     def get_mapped(self) -> bool: ...
     def get_margin_bottom(self) -> int: ...
@@ -33975,7 +33981,8 @@ class Widget(GObject.InitiallyUnowned, Accessible, Buildable, ConstraintTarget):
     def set_layout_manager(
         cls, layout_manager: typing.Optional[LayoutManager] = None
     ) -> None: ...
-    def set_layout_manager_type(*args, **kwargs): ...  # FIXME Function
+    # override
+    def set_layout_manager_type(self, type: typing.Type[typing.Any]) -> None: ...
     def set_limit_events(self, limit_events: bool) -> None: ...
     def set_margin_bottom(self, margin: int) -> None: ...
     def set_margin_end(self, margin: int) -> None: ...