diff --git a/CHANGELOG.md b/CHANGELOG.md
index cce2b38..d0575f0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+
+## [0.4.0] - 2026-01-12
 ### Added
 - Added user authentication system with session-based login (#50)
   - `users` table with password hashing (bcrypt), admin flag, active status