diff --git a/CHANGELOG.md b/CHANGELOG.md
index e21aaf8..2f6f372 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,17 @@
+## [v1.21.1] - 2024-05-05
+
+[Release notes](https://github.com/betahuhn/repo-file-sync-action/releases/tag/v1.21.1) · [Compare](https://github.com/betahuhn/repo-file-sync-action/compare/v1.21.0...v1.21.1) · [Tag](https://github.com/betahuhn/repo-file-sync-action/tree/v1.21.1) · Archive ([zip](https://github.com/betahuhn/repo-file-sync-action/archive/v1.21.1.zip) · [tar.gz](https://github.com/betahuhn/repo-file-sync-action/archive/v1.21.1.tar.gz))
+
+### Bug fixes
+
+- [`899c636`](https://github.com/betahuhn/repo-file-sync-action/commit/899c636)  Create Commit tree using GitHub API (#321)
+(Issues: [`#321`](https://github.com/betahuhn/repo-file-sync-action/issues/321) [`#246`](https://github.com/betahuhn/repo-file-sync-action/issues/246))
+
+### Security issues
+
+- [`88a3448`](https://github.com/betahuhn/repo-file-sync-action/commit/88a3448)  Update action to Node 20 (#331)
+(Issues: [`#331`](https://github.com/betahuhn/repo-file-sync-action/issues/331) [`#332`](https://github.com/betahuhn/repo-file-sync-action/issues/332))
+
 ## [v1.21.0] - 2023-01-10
 
 [Release notes](https://github.com/betahuhn/repo-file-sync-action/releases/tag/v1.21.0) · [Compare](https://github.com/betahuhn/repo-file-sync-action/compare/v1.20.2...v1.21.0) · [Tag](https://github.com/betahuhn/repo-file-sync-action/tree/v1.21.0) · Archive ([zip](https://github.com/betahuhn/repo-file-sync-action/archive/v1.21.0.zip) · [tar.gz](https://github.com/betahuhn/repo-file-sync-action/archive/v1.21.0.tar.gz))
diff --git a/package-lock.json b/package-lock.json
index be9b691..3cf1a13 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "repo-file-sync-action",
-  "version": "1.21.0",
+  "version": "1.21.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "repo-file-sync-action",
-      "version": "1.21.0",
+      "version": "1.21.1",
       "license": "MIT",
       "dependencies": {
         "@actions/core": "^1.10.0",
diff --git a/package.json b/package.json
index e57ada7..0384762 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "repo-file-sync-action",
-  "version": "1.21.0",
+  "version": "1.21.1",
   "description": "GitHub Action to keep files like Action workflows or entire directories in sync between multiple repositories.",
   "main": "dist/index.js",
   "type": "module",