diff --git a/stdlib/@python2/__builtin__.pyi b/stdlib/@python2/__builtin__.pyi
index ed42c1e8f..4eb5424d8 100644
--- a/stdlib/@python2/__builtin__.pyi
+++ b/stdlib/@python2/__builtin__.pyi
@@ -44,7 +44,7 @@ from typing import (
     ValuesView,
     overload,
 )
-from typing_extensions import Literal
+from typing_extensions import Literal, final
 
 class _SupportsIndex(Protocol):
     def __index__(self) -> int: ...
@@ -568,6 +568,7 @@ class memoryview(Sized, Container[str]):
     def tobytes(self) -> bytes: ...
     def tolist(self) -> List[int]: ...
 
+@final
 class bool(int):
     def __new__(cls: Type[_T], __o: object = ...) -> _T: ...
     @overload
diff --git a/stdlib/@python2/builtins.pyi b/stdlib/@python2/builtins.pyi
index ed42c1e8f..4eb5424d8 100644
--- a/stdlib/@python2/builtins.pyi
+++ b/stdlib/@python2/builtins.pyi
@@ -44,7 +44,7 @@ from typing import (
     ValuesView,
     overload,
 )
-from typing_extensions import Literal
+from typing_extensions import Literal, final
 
 class _SupportsIndex(Protocol):
     def __index__(self) -> int: ...
@@ -568,6 +568,7 @@ class memoryview(Sized, Container[str]):
     def tobytes(self) -> bytes: ...
     def tolist(self) -> List[int]: ...
 
+@final
 class bool(int):
     def __new__(cls: Type[_T], __o: object = ...) -> _T: ...
     @overload
diff --git a/stdlib/builtins.pyi b/stdlib/builtins.pyi
index 6e75c5ef7..8553a2c09 100644
--- a/stdlib/builtins.pyi
+++ b/stdlib/builtins.pyi
@@ -60,7 +60,7 @@ from typing import (
     ValuesView,
     overload,
 )
-from typing_extensions import Literal, SupportsIndex
+from typing_extensions import Literal, SupportsIndex, final
 
 if sys.version_info >= (3, 9):
     from types import GenericAlias
@@ -666,6 +666,7 @@ class memoryview(Sized, Container[int]):
     else:
         def hex(self) -> str: ...
 
+@final
 class bool(int):
     def __new__(cls: Type[_T], __o: object = ...) -> _T: ...
     @overload