diff --git a/django-stubs/core/cache/backends/base.pyi b/django-stubs/core/cache/backends/base.pyi
index 9f12420..75f4f51 100644
--- a/django-stubs/core/cache/backends/base.pyi
+++ b/django-stubs/core/cache/backends/base.pyi
@@ -19,16 +19,16 @@ class BaseCache:
     def __init__(self, params: Dict[str, Any]) -> None: ...
     def get_backend_timeout(self, timeout: Any = ...) -> Optional[float]: ...
     def make_key(self, key: Any, version: Optional[Any] = ...) -> str: ...
-    def add(self, key: Any, value: Any, timeout: Any = ..., version: Optional[Any] = ...) -> None: ...
+    def add(self, key: Any, value: Any, timeout: Any = ..., version: Optional[Any] = ...) -> bool: ...
     def get(self, key: Any, default: Optional[Any] = ..., version: Optional[Any] = ...) -> Any: ...
     def set(self, key: Any, value: Any, timeout: Any = ..., version: Optional[Any] = ...) -> None: ...
-    def touch(self, key: Any, timeout: Any = ..., version: Optional[Any] = ...) -> None: ...
+    def touch(self, key: Any, timeout: Any = ..., version: Optional[Any] = ...) -> bool: ...
     def delete(self, key: Any, version: Optional[Any] = ...) -> None: ...
     def get_many(self, keys: List[str], version: Optional[int] = ...) -> Dict[str, Union[int, str]]: ...
     def get_or_set(
         self, key: Any, default: Optional[Any], timeout: Any = ..., version: Optional[int] = ...
     ) -> Optional[Any]: ...
-    def has_key(self, key: Any, version: Optional[Any] = ...): ...
+    def has_key(self, key: Any, version: Optional[Any] = ...) -> bool: ...
     def incr(self, key: str, delta: int = ..., version: Optional[int] = ...) -> int: ...
     def decr(self, key: str, delta: int = ..., version: Optional[int] = ...) -> int: ...
     def __contains__(self, key: str) -> bool: ...