diff --git a/CHANGELOG.md b/CHANGELOG.md
index cb3a1b9..d86ecb4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,8 @@ Format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/). Version
 
 ## [Unreleased]
 
+## [0.4.0] — 2026-06-28
+
 ### Fixed
 
 - **Showcase page no longer wedges the renderer** (WHYNOT-WP-0002 T11). `<wn-breadcrumb>`
diff --git a/package.json b/package.json
index 0d36dc6..2d60729 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@whynot/design",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "The neutral, mostly-black-and-white visual language for whynot — prototype cards, signal records, beta plans, decision documents, and any other deliberately-unfinished artefact. Ships tokens, CSS, and Lit-based web components consumable from React, Django, Vue, plain HTML, or anywhere a custom element runs.",
   "private": false,
   "type": "module",