diff --git a/sqs_workers/async_task.py b/sqs_workers/async_task.py
index 43e6596..3a51b8f 100644
--- a/sqs_workers/async_task.py
+++ b/sqs_workers/async_task.py
@@ -8,6 +8,7 @@
     Generator,
     Generic,
     NoReturn,
+    Optional,
     TypeVar,
 )
 from typing_extensions import ParamSpec
@@ -61,7 +62,7 @@ def batch(self) -> Generator[None, None, None]:
         with self.queue.add_batch():
             yield
 
-    def delay(self, *args: P.args, **kwargs: P.kwargs) -> str | None:
+    def delay(self, *args: P.args, **kwargs: P.kwargs) -> Optional[str]:
         """
         Run the task asynchronously.
         """
diff --git a/sqs_workers/queue.py b/sqs_workers/queue.py
index ef96ddd..4ca571e 100644
--- a/sqs_workers/queue.py
+++ b/sqs_workers/queue.py
@@ -533,7 +533,7 @@ def add_raw_job(
         delay_seconds,
         deduplication_id,
         group_id: Optional[str],
-    ) -> str | None:
+    ) -> Optional[str]:
         """
         Low-level function to put message to the queue
         """