diff --git a/CHANGES/1357.misc.rst b/CHANGES/1357.misc.rst
new file mode 100644
index 00000000..0f268f7a
--- /dev/null
+++ b/CHANGES/1357.misc.rst
@@ -0,0 +1 @@
+new improved CallableMixin
diff --git a/aiogram/dispatcher/event/handler.py b/aiogram/dispatcher/event/handler.py
index f20c986b..8afeb182 100644
--- a/aiogram/dispatcher/event/handler.py
+++ b/aiogram/dispatcher/event/handler.py
@@ -4,7 +4,7 @@ import inspect
 import warnings
 from dataclasses import dataclass, field
 from functools import partial
-from typing import Any, Callable, Dict, List, Optional, Tuple
+from typing import Any, Callable, Dict, List, Optional, Tuple, Set
 
 from magic_filter.magic import MagicFilter as OriginalMagicFilter
 
@@ -21,7 +21,7 @@ CallbackType = Callable[..., Any]
 class CallableMixin:
     callback: CallbackType
     awaitable: bool = field(init=False)
-    params: set[str] = field(init=False)
+    params: Set[str] = field(init=False)
     varkw: bool = field(init=False)
 
     def __post_init__(self) -> None:
diff --git a/tests/test_dispatcher/test_event/test_handler.py b/tests/test_dispatcher/test_event/test_handler.py
index 0c59aff4..b9368a3b 100644
--- a/tests/test_dispatcher/test_event/test_handler.py
+++ b/tests/test_dispatcher/test_event/test_handler.py
@@ -1,5 +1,5 @@
 import functools
-from typing import Any, Dict, Union, Callable
+from typing import Any, Dict, Union, Callable, Set
 
 import pytest
 from magic_filter import F as A
@@ -61,7 +61,7 @@ class TestCallableMixin:
             pytest.param(SyncCallable(), {"self", "foo", "bar", "baz"}),
         ],
     )
-    def test_init_args_spec(self, callback: Callable, args: set[str]):
+    def test_init_args_spec(self, callback: Callable, args: Set[str]):
         obj = CallableMixin(callback)
         assert set(obj.params) == args