diff --git a/CHANGELOG.md b/CHANGELOG.md
index b268ff5..fa6e61c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2.2.0
+
+- Make `Query` sealed instead of abstract.
+
 ## 2.1.1
 
 - Updated `petitparser` dependency.
diff --git a/lib/src/ast.dart b/lib/src/ast.dart
index 0b0ebe9..37270ff 100644
--- a/lib/src/ast.dart
+++ b/lib/src/ast.dart
@@ -26,7 +26,7 @@ abstract class QueryEvaluator<R> {
 }
 
 /// Base interface for queries.
-abstract class Query {
+sealed class Query {
   const Query({
     required this.position,
   });
diff --git a/pubspec.yaml b/pubspec.yaml
index 05d66bc..925853b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -2,11 +2,11 @@ name: query
 description: >
   Search query parser to implement customized search.
   Supports boolean groups, field scopes, ranges, comparisons...
-version: 2.1.1
+version: 2.2.0
 homepage: https://github.com/isoos/query
 
 environment:
-  sdk: '>=2.17.0 <4.0.0'
+  sdk: '>=3.0.0 <4.0.0'
 
 dependencies:
   petitparser: ^6.0.0