diff --git a/CHANGELOG.md b/CHANGELOG.md
index bae39ce..bf71d15 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com), and 
 
 ## [Unreleased]
 
+## [4.0.0] — 2024–08–14
+
 ### Changed
 
 - The minimum required version of `stylelint` has been increased to `16.8.1`.
@@ -44,7 +46,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com), and 
 
 - Base config for `stylelint`.
 
-[Unreleased]: https://github.com/firefoxic/stylelint-config/compare/v3.0.0...HEAD
+[Unreleased]: https://github.com/firefoxic/stylelint-config/compare/v4.0.0...HEAD
+[4.0.0]: https://github.com/firefoxic/stylelint-config/compare/v3.0.0...v4.0.0
 [3.0.0]: https://github.com/firefoxic/stylelint-config/compare/v2.0.0...v3.0.0
 [2.0.0]: https://github.com/firefoxic/stylelint-config/compare/v1.0.0...v2.0.0
 [1.0.0]: https://github.com/firefoxic/stylelint-config/releases/tag/v1.0.0
diff --git a/package.json b/package.json
index 879f4f0..93d76a2 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
 	"name": "@firefoxic/stylelint-config",
 	"description": "Shared config for stylelint by firefoxic.",
-	"version": "3.0.0",
+	"version": "4.0.0",
 	"license": "MIT",
 	"author": {
 		"name": "Sergey Artemov",