diff --git a/web/_tool/fix_base_tags.dart b/web/_tool/fix_base_tags.dart
index 0331bed0f..7c6f066ad 100644
--- a/web/_tool/fix_base_tags.dart
+++ b/web/_tool/fix_base_tags.dart
@@ -10,7 +10,7 @@ Future<void> main() async {
 ///
 /// For example, after building using `build_ci.dart,
 /// `../samples_index/public/web/navigation_and_routing/index.html` should
-/// contain `<base href="/samples/web/navigation_and_routing/">
+/// contain `<base href="/samples/web/navigation_and_routing/">`
 Future<void> fixBaseTags() async {
   print('currentDir = ${Directory.current.path}');
   var builtSamplesDir = Directory(p.joinAll([
diff --git a/web/_tool/pubspec.yaml b/web/_tool/pubspec.yaml
index 33dd4f2c6..fa9980d3d 100644
--- a/web/_tool/pubspec.yaml
+++ b/web/_tool/pubspec.yaml
@@ -9,4 +9,4 @@ dependencies:
   path: ^1.8.0
 
 dev_dependencies:
-  lints: ^4.0.0
+  lints: ^5.0.0