diff --git a/lib/common/constant.dart b/lib/common/constant.dart
index 28ed87ef..bd450324 100644
--- a/lib/common/constant.dart
+++ b/lib/common/constant.dart
@@ -434,8 +434,7 @@ class Constant {
         textButtonTheme: TextButtonThemeData(
           style: TextButton.styleFrom(foregroundColor: const Color(0xFF007AFF)),
         ),
-        dialogBackgroundColor: const Color.fromRGBO(28, 28, 30, 1.0),
-        textTheme: Typography.whiteCupertino,
+        textTheme: Typography.whiteCupertino, dialogTheme: DialogThemeData(backgroundColor: const Color.fromRGBO(28, 28, 30, 1.0)),
       );
     }
     return ThemeData(
diff --git a/lib/page/subpage_timetable.dart b/lib/page/subpage_timetable.dart
index ebcb2eed..eb6cb167 100644
--- a/lib/page/subpage_timetable.dart
+++ b/lib/page/subpage_timetable.dart
@@ -39,6 +39,7 @@ import 'package:dan_xi/util/public_extension_methods.dart';
 import 'package:dan_xi/util/retrier.dart';
 import 'package:dan_xi/util/stream_listener.dart';
 import 'package:dan_xi/util/timetable_converter_impl.dart';
+import 'package:dan_xi/widget/dialogs/manually_add_course_dialog.dart';
 import 'package:dan_xi/widget/libraries/error_page_widget.dart';
 import 'package:dan_xi/widget/libraries/future_widget.dart';
 import 'package:dan_xi/widget/libraries/platform_context_menu.dart';
@@ -55,8 +56,6 @@ import 'package:provider/provider.dart';
 import 'package:share_plus/share_plus.dart';
 import 'package:tutorial_coach_mark/tutorial_coach_mark.dart';
 
-import '../widget/dialogs/manually_add_course_dialog.dart';
-
 /// Keys to locate buttons in the interactive tutorial.
 GlobalKey keyButton = GlobalKey();
 GlobalKey keyButton1 = GlobalKey();
@@ -524,7 +523,7 @@ class TimetableSubPageState extends PlatformSubpageState<TimetableSubPage> {
       key: indicatorKey,
       edgeOffset: MediaQuery.of(context).padding.top,
       color: Theme.of(context).colorScheme.secondary,
-      backgroundColor: Theme.of(context).dialogBackgroundColor,
+      backgroundColor: Theme.of(context).dialogTheme.backgroundColor,
       onRefresh: () async {
         forceLoadFromRemote = true;
         HapticFeedback.mediumImpact();
diff --git a/lib/util/webvpn_proxy.dart b/lib/util/webvpn_proxy.dart
index 73d74334..012195f7 100644
--- a/lib/util/webvpn_proxy.dart
+++ b/lib/util/webvpn_proxy.dart
@@ -148,7 +148,7 @@ class WebvpnProxy {
       } finally {
         loginSession = null;
       }
-      // Any exception thrown won't be catched and will be propagated to widgets
+      // Any exception thrown won't be caught and will be propagated to widgets
     }
   }
 
diff --git a/lib/widget/forum/auto_bbs_image.dart b/lib/widget/forum/auto_bbs_image.dart
index fcb73a41..6e1a4551 100644
--- a/lib/widget/forum/auto_bbs_image.dart
+++ b/lib/widget/forum/auto_bbs_image.dart
@@ -17,9 +17,7 @@
 
 import 'package:cached_network_image/cached_network_image.dart';
 import 'package:dan_xi/util/io/cache_manager_with_webvpn.dart';
-import 'package:dan_xi/util/io/dio_utils.dart';
 import 'package:dan_xi/widget/forum/render/base_render.dart';
-import 'package:dio/dio.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_platform_widgets/flutter_platform_widgets.dart';
 import 'package:nil/nil.dart';
@@ -49,13 +47,11 @@ class BBSImagePlaceholder extends StatelessWidget {
 /// A network image loader that will show the image from network, and
 /// fit the image's size to at most [maxWidth].
 class AutoBBSImage extends StatelessWidget {
-  final Dio dio =
-      DioUtils.newDioWithProxy(BaseOptions(responseType: ResponseType.bytes));
   final String src;
   final double? maxWidth;
   final ImageTapCallback? onTapImage;
 
-  AutoBBSImage({super.key, required this.src, this.maxWidth, this.onTapImage});
+  const AutoBBSImage({super.key, required this.src, this.maxWidth, this.onTapImage});
 
   @override
   Widget build(BuildContext context) {