diff --git a/CHANGELOG.md b/CHANGELOG.md
index ddcf175..5c6648f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,22 @@
-# Change Log
+# Changelog
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+# [4.0.0](https://github.com/ikatyang/unicode-regex/compare/v3.0.0...v4.0.0) (2023-07-09)
+
+### Build System
+
+- update infra ([#298](https://github.com/ikatyang/unicode-regex/issues/298)) ([4270f16](https://github.com/ikatyang/unicode-regex/commit/4270f16ae9d679a93a1dffc08700568452c162dd))
+
+### Features
+
+- support Unicode 15.0.0 ([#299](https://github.com/ikatyang/unicode-regex/issues/299)) ([775d18e](https://github.com/ikatyang/unicode-regex/commit/775d18e4ecf693689b421cf3d41cdfd496af4eb2))
+
+### BREAKING CHANGES
+
+- upgrade Unicode data from v12.1.0 to v15.0.0
+- this package is now pure ESM
+
 <a name="3.0.0"></a>
 
 # [3.0.0](https://github.com/ikatyang/unicode-regex/compare/v2.0.0...v3.0.0) (2019-09-29)
diff --git a/package.json b/package.json
index 610a32e..31a9fec 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "unicode-regex",
   "type": "module",
-  "version": "3.0.0",
+  "version": "4.0.0",
   "description": "regular expression for matching unicode category",
   "keywords": [
     "regular-expression",