diff --git a/cantok/tokens/abstract/abstract_token.py b/cantok/tokens/abstract/abstract_token.py
index 4261612..184c2a5 100644
--- a/cantok/tokens/abstract/abstract_token.py
+++ b/cantok/tokens/abstract/abstract_token.py
@@ -1,7 +1,8 @@
+import sys
 from sys import getrefcount
 from abc import ABC, abstractmethod
 from threading import RLock
-from typing import List, Dict, Awaitable, Optional, Union, Any
+from typing import TypeAlias, List, Dict, Awaitable, Optional, Union, Any
 from collections.abc import Iterable
 
 from cantok.errors import CancellationError
@@ -10,6 +11,11 @@
 from cantok.tokens.abstract.coroutine_wrapper import WaitCoroutineWrapper
 
 
+if sys.version_info >= (3, 8):
+    IterableWithTokens: TypeAlias = Iterable['AbstractToken']  # pragma: no cover
+else:
+    IterableWithTokens = Iterable  # pragma: no cover
+
 class AbstractToken(ABC):
     exception = CancellationError
     rollback_if_nondirect_polling = False
@@ -79,7 +85,7 @@ def __add__(self, item: 'AbstractToken') -> 'AbstractToken':
     def __bool__(self) -> bool:
         return self.keep_on()
 
-    def filter_tokens(self, tokens: Iterable['AbstractToken']) -> List['AbstractToken']:
+    def filter_tokens(self, tokens: IterableWithTokens) -> List['AbstractToken']:
         from cantok import DefaultToken
 
         result: List[AbstractToken] = []