diff --git a/aiomisc/service/uvicorn.py b/aiomisc/service/uvicorn.py
index 8982c4dd..928ad3b2 100644
--- a/aiomisc/service/uvicorn.py
+++ b/aiomisc/service/uvicorn.py
@@ -118,5 +118,5 @@ async def start(self) -> Any:
         self.server = Server(config)
         self.serve_task = asyncio.create_task(self.server.serve(sockets=[self.sock]))
 
-    async def stop(self, exception: Exception | None = None) -> None:
+    async def stop(self, exception: Optional[Exception] = None) -> None:
         await self.serve_task