diff --git a/stubs/JACK-Client/jack/__init__.pyi b/stubs/JACK-Client/jack/__init__.pyi
index 0d433506c..96b5b97b1 100644
--- a/stubs/JACK-Client/jack/__init__.pyi
+++ b/stubs/JACK-Client/jack/__init__.pyi
@@ -104,29 +104,29 @@ class Client:
     def transport_reposition_struct(self, position: _JackPositionT) -> None: ...  # TODO
     def set_sync_timeout(self, timeout: int) -> None: ...
     def set_freewheel(self, onoff: bool) -> None: ...
-    def set_shutdown_callback(self, callback: Callable[[Status, str], None]) -> None: ...
-    def set_process_callback(self, callback: Callable[[int], None]) -> None: ...
-    def set_freewheel_callback(self, callback: Callable[[bool], None]) -> None: ...
-    def set_blocksize_callback(self, callback: Callable[[int], None]) -> None: ...
-    def set_samplerate_callback(self, callback: Callable[[int], None]) -> None: ...
-    def set_client_registration_callback(self, callback: Callable[[str, bool], None]) -> None: ...
+    def set_shutdown_callback(self, callback: Callable[[Status, str], object]) -> None: ...
+    def set_process_callback(self, callback: Callable[[int], object]) -> None: ...
+    def set_freewheel_callback(self, callback: Callable[[bool], object]) -> None: ...
+    def set_blocksize_callback(self, callback: Callable[[int], object]) -> None: ...
+    def set_samplerate_callback(self, callback: Callable[[int], object]) -> None: ...
+    def set_client_registration_callback(self, callback: Callable[[str, bool], object]) -> None: ...
     def set_port_registration_callback(
-        self, callback: Callable[[Port, bool], None] | None = ..., only_available: bool = ...
+        self, callback: Callable[[Port, bool], object] | None = ..., only_available: bool = ...
     ) -> None: ...
     def set_port_connect_callback(
-        self, callback: Callable[[Port, Port, bool], None] | None = ..., only_available: bool = ...
+        self, callback: Callable[[Port, Port, bool], object] | None = ..., only_available: bool = ...
     ) -> None: ...
     def set_port_rename_callback(
-        self, callback: Callable[[Port, str, str], None] | None = ..., only_available: bool = ...
+        self, callback: Callable[[Port, str, str], object] | None = ..., only_available: bool = ...
     ) -> None: ...
-    def set_graph_order_callback(self, callback: Callable[[], None]) -> None: ...
-    def set_xrun_callback(self, callback: Callable[[float], None]) -> None: ...
-    def set_sync_callback(self, callback: Callable[[int, _JackPositionT], None] | None) -> None: ...
+    def set_graph_order_callback(self, callback: Callable[[], object]) -> None: ...
+    def set_xrun_callback(self, callback: Callable[[float], object]) -> None: ...
+    def set_sync_callback(self, callback: Callable[[int, _JackPositionT], object] | None) -> None: ...
     def release_timebase(self) -> None: ...
     def set_timebase_callback(
-        self, callback: Callable[[int, int, _JackPositionT, bool], None] | None = ..., conditional: bool = ...
+        self, callback: Callable[[int, int, _JackPositionT, bool], object] | None = ..., conditional: bool = ...
     ) -> bool: ...
-    def set_property_change_callback(self, callback: Callable[[int, str, int], None]) -> None: ...
+    def set_property_change_callback(self, callback: Callable[[int, str, int], object]) -> None: ...
     def get_uuid_for_client_name(self, name: str) -> str: ...
     def get_client_name_by_uuid(self, uuid: str) -> str: ...
     def get_port_by_name(self, name: str) -> Port: ...
@@ -282,6 +282,6 @@ def version() -> tuple[int, int, int, int]: ...
 def version_string() -> str: ...
 def client_name_size() -> int: ...
 def port_name_size() -> int: ...
-def set_error_function(callback: Callable[[str], None] | None = ...) -> None: ...
-def set_info_function(callback: Callable[[str], None] | None = ...) -> None: ...
+def set_error_function(callback: Callable[[str], object] | None = ...) -> None: ...
+def set_info_function(callback: Callable[[str], object] | None = ...) -> None: ...
 def client_pid(name: str) -> int: ...