diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7ac93549b76..a8ee3cc117d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,21 @@
 # rollup changelog
 
+## 4.21.3
+
+_2024-09-12_
+
+### Bug Fixes
+
+- Always respect side effects in left-hand side of optional chain (#5642)
+- Update stack trace for augmented errors to not hide relevant information (#5640)
+
+### Pull Requests
+
+- [#5636](https://github.com/rollup/rollup/pull/5636): chore(deps): lock file maintenance minor/patch updates (@renovate[bot])
+- [#5637](https://github.com/rollup/rollup/pull/5637): chore(deps): lock file maintenance (@renovate[bot])
+- [#5640](https://github.com/rollup/rollup/pull/5640): fix: keep the message of stack up-to-date (@TrickyPi)
+- [#5642](https://github.com/rollup/rollup/pull/5642): fix: include left-side effect of optional chaining in the end of hasEffectsAsChainElement (@TrickyPi)
+
 ## 4.21.2
 
 _2024-08-30_
diff --git a/browser/package.json b/browser/package.json
index c88f1835035..f4250fc4d11 100644
--- a/browser/package.json
+++ b/browser/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@rollup/browser",
-  "version": "4.21.2",
+  "version": "4.21.3",
   "description": "Next-generation ES module bundler browser build",
   "main": "dist/rollup.browser.js",
   "module": "dist/es/rollup.browser.js",
diff --git a/package-lock.json b/package-lock.json
index e52ea17bc1f..826ebe7935c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "rollup",
-  "version": "4.21.2",
+  "version": "4.21.3",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "rollup",
-      "version": "4.21.2",
+      "version": "4.21.3",
       "license": "MIT",
       "dependencies": {
         "@types/estree": "1.0.5"
diff --git a/package.json b/package.json
index cb1f7789885..be9dcc49417 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "rollup",
-  "version": "4.21.2",
+  "version": "4.21.3",
   "description": "Next-generation ES module bundler",
   "main": "dist/rollup.js",
   "module": "dist/es/rollup.js",