diff --git a/django-stubs/core/cache/backends/base.pyi b/django-stubs/core/cache/backends/base.pyi
index 75f4f51..2874d0f 100644
--- a/django-stubs/core/cache/backends/base.pyi
+++ b/django-stubs/core/cache/backends/base.pyi
@@ -24,18 +24,18 @@ class BaseCache:
     def set(self, key: Any, value: 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_many(self, keys: Iterable[Any], version: Optional[int] = ...) -> Dict[Any, Any]: ...
     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] = ...) -> 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: ...
-    def set_many(self, data: Dict[str, Any], timeout: Any = ..., version: Optional[Any] = ...) -> List[Any]: ...
+    def incr(self, key: Any, delta: int = ..., version: Optional[int] = ...) -> int: ...
+    def decr(self, key: Any, delta: int = ..., version: Optional[int] = ...) -> int: ...
+    def __contains__(self, key: Any) -> bool: ...
+    def set_many(self, data: Dict[Any, Any], timeout: Any = ..., version: Optional[Any] = ...) -> List[Any]: ...
     def delete_many(self, keys: Iterable[Any], version: Optional[Any] = ...) -> None: ...
     def clear(self) -> None: ...
-    def validate_key(self, key: str) -> None: ...
-    def incr_version(self, key: str, delta: int = ..., version: Optional[int] = ...) -> int: ...
-    def decr_version(self, key: str, delta: int = ..., version: Optional[int] = ...) -> int: ...
+    def validate_key(self, key: Any) -> None: ...
+    def incr_version(self, key: Any, delta: int = ..., version: Optional[int] = ...) -> int: ...
+    def decr_version(self, key: Any, delta: int = ..., version: Optional[int] = ...) -> int: ...
     def close(self, **kwargs: Any) -> None: ...