diff --git a/CHANGELOG.md b/CHANGELOG.md
index def3e76c2..39c56b7d1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-# HEAD
+# 21.1.0
 
 ## Features
 
diff --git a/assets/package/README.md b/assets/package/README.md
index 29218c606..08b939d25 100644
--- a/assets/package/README.md
+++ b/assets/package/README.md
@@ -20,7 +20,7 @@ Install package with NPM and add it to your dependencies:
 </tr>
 <tr>
 <td>Version</td>
-<td><a href="https://github.com/mozilla/protocol/blob/main/CHANGELOG.md">21.0.0</a></td>
+<td><a href="https://github.com/mozilla/protocol/blob/main/CHANGELOG.md">21.1.0</a></td>
 </tr>
 <tr>
 <td>Releases</td>
diff --git a/assets/package/package.json b/assets/package/package.json
index 89e5355d8..0b585df6f 100644
--- a/assets/package/package.json
+++ b/assets/package/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@mozilla-protocol/core",
-  "version": "21.0.0",
+  "version": "21.1.0",
   "description": "A design system for Mozilla's websites.",
   "repository": {
     "type": "git",
diff --git a/package-lock.json b/package-lock.json
index a203ea1d1..1de1b8b8e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "protocol",
-  "version": "21.0.0",
+  "version": "21.1.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "protocol",
-      "version": "21.0.0",
+      "version": "21.1.0",
       "license": "MIT",
       "dependencies": {
         "@babel/core": "^7.27.1",
diff --git a/package.json b/package.json
index a545cc6c6..133415c49 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "protocol",
-  "version": "21.0.0",
+  "version": "21.1.0",
   "private": true,
   "author": "Mozilla",
   "description": "A design system for Mozilla's websites.",