diff --git a/lib/matcher.dart b/lib/matcher.dart
index 72918aa..bb01258 100644
--- a/lib/matcher.dart
+++ b/lib/matcher.dart
@@ -3,6 +3,8 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// Support for specifying test expectations, such as for unit tests.
+library matcher;
+
 export 'src/core_matchers.dart';
 export 'src/custom_matcher.dart';
 export 'src/description.dart';
diff --git a/pubspec.yaml b/pubspec.yaml
index 3979a07..f7eb6a1 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -17,7 +17,7 @@ dependencies:
 
 dev_dependencies:
   fake_async: ^1.3.0
-  lints: ^2.0.0
+  lints: ^3.0.0
   test: ^1.23.0
 
 dependency_overrides: