diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 477146d..33ce2eb 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -19,7 +19,7 @@ jobs:
       - name: Install dependencies
         run: flutter pub get
       - name: Format
-        run: flutter format --set-exit-if-changed lib test
+        run: dart format --set-exit-if-changed lib test
       - name: Analyze
         run: flutter analyze lib test
       - name: Run tests
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1950799..52da224 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## [5.1.3] - 09.04.2023
+
+* Prepare for dart 3
+
 ## [5.1.2] - 18.06.2022
 
 * Documentation improvements
diff --git a/LICENSE b/LICENSE
index 4ef124b..adc4c4d 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2022 Dimitrios Begnis
+Copyright (c) 2023 Dimitrios Begnis
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/README.md b/README.md
index d83022b..737a743 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@ A flutter `ListView` in which list items can be grouped to sections.
 Add the package to your pubspec.yaml:
 
 ```yaml
- grouped_list: ^5.1.2
+ grouped_list: ^5.1.3
  ```
  
  In your dart file, import the library:
diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index 22dc4fb..f9f92ee 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -4,7 +4,7 @@ publish_to: 'none'
 version: 2.0.0
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: ">=2.17.0 <4.0.0"
   flutter: ">=1.17.0"
 
 dependencies:
@@ -12,7 +12,7 @@ dependencies:
     sdk: flutter
   grouped_list:
     path: ../
-  intl: ^0.17.0
+  intl: ^0.18.0
 
 dev_dependencies:
   flutter_test:
diff --git a/lib/grouped_list.dart b/lib/grouped_list.dart
index dc90c68..bd923eb 100644
--- a/lib/grouped_list.dart
+++ b/lib/grouped_list.dart
@@ -380,7 +380,7 @@ class _GroupedListViewState<T, E> extends State<GroupedListView<T, E>> {
     if (_sortedElements.isEmpty) {
       return;
     }
-    
+
     _listBox ??= _key.currentContext?.findRenderObject() as RenderBox?;
     var listPos = _listBox?.localToGlobal(Offset.zero).dy ?? 0;
     _headerBox ??=
diff --git a/pubspec.yaml b/pubspec.yaml
index 5c7357d..e979815 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,11 +1,11 @@
 name: grouped_list
 description: A Flutter ListView where the list items can be grouped into sections.
-version: 5.1.2
+version: 5.1.3
 homepage: https://begnis.dev
 repository: https://github.com/Dimibe/grouped_list
 
 environment:
-  sdk: ">=2.12.0 <3.0.0"
+  sdk: ">=2.17.0 <4.0.0"
   flutter: ">=1.17.0"
 
 dependencies: