diff --git a/CHANGELOG.md b/CHANGELOG.md
index c28e25f..4c5cfad 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Dart Package Versioning](https://dart.dev/tools/pub
 
 ## [Unreleased]
 
+## [0.4.0] - 2021-07-01
+
 ### Added
 
 - Len class for field length validation —
diff --git a/pubspec.yaml b/pubspec.yaml
index d36c9e2..37f8814 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: formdator
 description: A formidable collection of form field validators that can be selected and grouped into various combinations through composition — Decorator Pattern.
-version: 0.3.1
+version: 0.4.0
 homepage: https://dartoos.dev
 repository: https://github.com/dartoos-dev/formdator