diff --git a/src/async_utils/_typings.py b/src/async_utils/_typings.py
index 41bd17a..a9b0ab5 100644
--- a/src/async_utils/_typings.py
+++ b/src/async_utils/_typings.py
@@ -30,16 +30,16 @@
 
 if TYPE_CHECKING:
     from typing import Any, Literal, Never, Self
+else:
 
+    def __getattr__(name: str):
+        if name in {"Any", "Literal", "Never", "Self"}:
+            import typing
 
-def __getattr__(name: str):
-    if name in {"Any", "Literal", "Never", "Self"}:
-        import typing
+            return getattr(typing, name)
 
-        return getattr(typing, name)
-
-    msg = f"module {__name__!r} has no attribute {name!r}"
-    raise AttributeError(msg)
+        msg = f"module {__name__!r} has no attribute {name!r}"
+        raise AttributeError(msg)
 
 
 __all__ = ["Any", "Literal", "Never", "Self"]
diff --git a/src/async_utils/corofunc_cache.py b/src/async_utils/corofunc_cache.py
index 62aeaa8..3eadc52 100644
--- a/src/async_utils/corofunc_cache.py
+++ b/src/async_utils/corofunc_cache.py
@@ -28,8 +28,8 @@
 type CoroFunc[**P, R] = Callable[P, Coroutine[t.Any, t.Any, R]]
 type CoroLike[**P, R] = Callable[P, Awaitable[R]]
 
-type _CT_RET = tuple[tuple[t.Any, ...], dict[t.str, t.Any]]
-type CacheTransformer = Callable[[tuple[t.Any, ...], dict[t.str, t.Any]], _CT_RET]
+type _CT_RET = tuple[tuple[t.Any, ...], dict[str, t.Any]]
+type CacheTransformer = Callable[[tuple[t.Any, ...], dict[str, t.Any]], _CT_RET]
 
 type Deco[**P, R] = Callable[[CoroLike[P, R]], CoroFunc[P, R]]
 
diff --git a/src/async_utils/task_cache.py b/src/async_utils/task_cache.py
index 234be3a..1011ec3 100644
--- a/src/async_utils/task_cache.py
+++ b/src/async_utils/task_cache.py
@@ -31,8 +31,8 @@
 type TaskFunc[**P, R] = CoroFunc[P, R] | Callable[P, asyncio.Task[R]]
 type TaskCoroFunc[**P, R] = CoroFunc[P, R] | TaskFunc[P, R]
 
-type _CT_RET = tuple[tuple[t.Any, ...], dict[t.str, t.Any]]
-type CacheTransformer = Callable[[tuple[t.Any, ...], dict[t.str, t.Any]], _CT_RET]
+type _CT_RET = tuple[tuple[t.Any, ...], dict[str, t.Any]]
+type CacheTransformer = Callable[[tuple[t.Any, ...], dict[str, t.Any]], _CT_RET]
 
 type Deco[**P, R] = Callable[[TaskCoroFunc[P, R]], TaskFunc[P, R]]