diff --git a/.github/release-please/manifest.json b/.github/release-please/manifest.json
index c707e5be..f21ea1ad 100644
--- a/.github/release-please/manifest.json
+++ b/.github/release-please/manifest.json
@@ -1,5 +1,5 @@
 {
-  "packages/nw-builder": "4.20.0",
+  "packages/nw-builder": "4.21.0",
   "packages/builder": "0.1.2",
   "packages/cli": "0.1.3",
   "packages/doctor": "0.1.2",
diff --git a/packages/nw-builder/CHANGELOG.md b/packages/nw-builder/CHANGELOG.md
index 64c1343c..d5496c87 100644
--- a/packages/nw-builder/CHANGELOG.md
+++ b/packages/nw-builder/CHANGELOG.md
@@ -7,6 +7,29 @@ and this project adheres to [Semantic Versioning](http://semver.org/) using [Con
 
 Since `v4.6.0`, we have switched to automated releases and this file does not need to be manually updated.
 
+## [4.21.0](https://github.com/nwutils/nw-builder/compare/nw-builder-v4.20.0...nw-builder-v4.21.0) (2026-09-08)
+
+
+### Features
+
+* **nw-builder:** add package mode using @nwutils/packager ([#1657](https://github.com/nwutils/nw-builder/issues/1657)) ([cf4e529](https://github.com/nwutils/nw-builder/commit/cf4e5297b79c5b8f6cb664805580d2f93ad8d584))
+
+
+### Bug Fixes
+
+* update package.json URLs ([2038ded](https://github.com/nwutils/nw-builder/commit/2038ded45f9b400ead698e91031ae8985a35d8ea))
+
+
+### Chores
+
+* **ci:** create one Release Please pull request instead of one per package ([05c45ad](https://github.com/nwutils/nw-builder/commit/05c45ad83ccfec47b4f1551fe6103b19c7143581))
+* **ci:** simplify monorepo configuration ([#1646](https://github.com/nwutils/nw-builder/issues/1646)) ([1117509](https://github.com/nwutils/nw-builder/commit/11175097906ae40a9562e0652f59207a3c782c4a))
+* migrate to monorepo ([#1638](https://github.com/nwutils/nw-builder/issues/1638)) ([8b15dd5](https://github.com/nwutils/nw-builder/commit/8b15dd586f04b45fbc8e09ee6b50d25d0a5999aa))
+* refactor build logic into @nwutils/builder ([#1647](https://github.com/nwutils/nw-builder/issues/1647)) ([a952f84](https://github.com/nwutils/nw-builder/commit/a952f84a810b60359d61e5edcdd09f290bc57b12))
+* release main ([#1649](https://github.com/nwutils/nw-builder/issues/1649)) ([40cb724](https://github.com/nwutils/nw-builder/commit/40cb7249ce5f7f509e20a5c0fb0059162d62a7b5))
+* release main ([#1651](https://github.com/nwutils/nw-builder/issues/1651)) ([460c86d](https://github.com/nwutils/nw-builder/commit/460c86d2958b678e8bdb914ac304cd3efbfa192f))
+* release main ([#1656](https://github.com/nwutils/nw-builder/issues/1656)) ([e2714d0](https://github.com/nwutils/nw-builder/commit/e2714d087b739af70e98d95c26d13c9a82e08830))
+
 ## [4.20.0](https://github.com/nwutils/nw-builder/compare/nw-builder-v4.19.2...nw-builder-v4.20.0) (2026-09-08)
 
 
diff --git a/packages/nw-builder/package.json b/packages/nw-builder/package.json
index 7c310562..f7065286 100644
--- a/packages/nw-builder/package.json
+++ b/packages/nw-builder/package.json
@@ -1,6 +1,6 @@
 {
   "name": "nw-builder",
-  "version": "4.20.0",
+  "version": "4.21.0",
   "description": "Build NW.js desktop applications for MacOS, Windows and Linux.",
   "keywords": [
     "NW.js",