diff --git a/src/MaaDebugger/maafw/__init__.py b/src/MaaDebugger/maafw/__init__.py
index 168fecf..0d2bd69 100644
--- a/src/MaaDebugger/maafw/__init__.py
+++ b/src/MaaDebugger/maafw/__init__.py
@@ -1,7 +1,7 @@
 import re
 from asyncify import asyncify
 from pathlib import Path
-from typing import Callable, List, Optional
+from typing import Callable, List, Optional, Union
 
 from maa.controller import AdbController, Win32Controller
 from maa.tasker import Tasker, RecognitionDetail, NotificationHandler
@@ -14,10 +14,10 @@
 
 class MaaFW:
 
-    resource: Resource | None
-    controller: AdbController | Win32Controller | None
-    tasker: Tasker | None
-    notification_handler: NotificationHandler | None
+    resource: Optional[Resource]
+    controller: Union[AdbController, Win32Controller, None]
+    tasker: Optional[Tasker]
+    notification_handler: Optional[NotificationHandler]
 
     def __init__(self):
         Toolkit.init_option("./")
diff --git a/src/MaaDebugger/utils/arg_parser/__init__.py b/src/MaaDebugger/utils/arg_parser/__init__.py
index e8e50aa..74835f3 100644
--- a/src/MaaDebugger/utils/arg_parser/__init__.py
+++ b/src/MaaDebugger/utils/arg_parser/__init__.py
@@ -1,4 +1,5 @@
 import argparse
+from typing import Optional
 
 from ..port_checker import PortChecker
 
@@ -20,7 +21,7 @@ def get_port(self) -> int:
         """
         Determine the port to use based on the provided arguments.
         """
-        specified_port: int | None = self.args.port
+        specified_port: Optional[int] = self.args.port
 
         if specified_port is not None:
             if PortChecker.is_port_in_use(specified_port):
diff --git a/src/MaaDebugger/webpage/reco_page/__init__.py b/src/MaaDebugger/webpage/reco_page/__init__.py
index 534491f..61106c5 100644
--- a/src/MaaDebugger/webpage/reco_page/__init__.py
+++ b/src/MaaDebugger/webpage/reco_page/__init__.py
@@ -1,4 +1,4 @@
-from typing import Dict, Tuple
+from typing import Dict, Tuple, Optional
 
 from nicegui import ui
 
@@ -24,7 +24,7 @@ async def reco_page(reco_id: int):
 
     ui.separator()
 
-    details: RecognitionDetail | None = await maafw.get_reco_detail(reco_id)
+    details: Optional[RecognitionDetail] = await maafw.get_reco_detail(reco_id)
     if not details:
         ui.markdown("## Not Found")
         return