diff --git a/changelog.md b/changelog.md
index 810a95a..c280bab 100644
--- a/changelog.md
+++ b/changelog.md
@@ -5,6 +5,16 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.4.2] - 2024-08-02
+
+### Added
+
+- Add `header` and `options` methods to `Lennarb` and `Lennarb::ApplicatiobBase`.
+
+### Fix
+
+- Fix Content-Length header to be the length of the body in the response.
+
 ## [0.4.1] - 2024-08-02
 
 ### Change
diff --git a/lib/lennarb/version.rb b/lib/lennarb/version.rb
index 76a86d8..36e45b1 100644
--- a/lib/lennarb/version.rb
+++ b/lib/lennarb/version.rb
@@ -4,7 +4,7 @@
 # Copyright, 2023-2024, by Aristóteles Coutinho.
 
 class Lennarb
-	VERSION = '0.4.1'
+	VERSION = '0.4.2'
 
 	public_constant :VERSION
 end