diff --git a/stdlib/sys.pyi b/stdlib/sys.pyi
index e60a58c02..5ccf9dff7 100644
--- a/stdlib/sys.pyi
+++ b/stdlib/sys.pyi
@@ -47,7 +47,7 @@ if sys.platform == "win32":
     dllhandle: int
 dont_write_bytecode: bool
 displayhook: Callable[[object], Any]
-excepthook: Callable[[Type[BaseException], BaseException, TracebackType], Any]
+excepthook: Callable[[Type[BaseException], BaseException, TracebackType | None], Any]
 exec_prefix: str
 executable: str
 float_repr_style: str
diff --git a/stdlib/tkinter/__init__.pyi b/stdlib/tkinter/__init__.pyi
index b7a5d3a11..9ca63924f 100644
--- a/stdlib/tkinter/__init__.pyi
+++ b/stdlib/tkinter/__init__.pyi
@@ -610,7 +610,7 @@ class Wm:
     withdraw = wm_withdraw
 
 class _ExceptionReportingCallback(Protocol):
-    def __call__(self, __exc: Type[BaseException], __val: BaseException, __tb: TracebackType) -> Any: ...
+    def __call__(self, __exc: Type[BaseException], __val: BaseException, __tb: TracebackType | None) -> Any: ...
 
 class Tk(Misc, Wm):
     master: None