diff --git a/README.md b/README.md
index b6295fa75..c306ede1a 100644
--- a/README.md
+++ b/README.md
@@ -29,4 +29,4 @@ Aves is a gallery and metadata explorer app. It is built for Android, with Flutt
 Create a file named `<app dir>/android/key.properties`. It should contain a reference to a keystore for app signing, and other necessary credentials. See `<app dir>/android/key_template.properties` for the expected keys.
 
 [Version badge]: https://img.shields.io/github/v/release/deckerst/aves?include_prereleases&sort=semver
-[Build badge]: https://img.shields.io/github/workflow/status/deckerst/aves/Release%20on%20tag
+[Build badge]: https://img.shields.io/github/workflow/status/deckerst/aves/Quality%20check
diff --git a/lib/widgets/common/thumbnail/scroller.dart b/lib/widgets/common/thumbnail/scroller.dart
index dfbc08ade..035e66ec2 100644
--- a/lib/widgets/common/thumbnail/scroller.dart
+++ b/lib/widgets/common/thumbnail/scroller.dart
@@ -31,7 +31,7 @@ class _ThumbnailScrollerState extends State<ThumbnailScroller> {
   final _cancellableNotifier = ValueNotifier(true);
   late ScrollController _scrollController;
   bool _syncScroll = true;
-  ValueNotifier<int> _currentIndexNotifier = ValueNotifier(-1);
+  final ValueNotifier<int> _currentIndexNotifier = ValueNotifier(-1);
 
   static const double extent = 48;
   static const double separatorWidth = 2;