diff --git a/CHANGELOG.md b/CHANGELOG.md
index bae6b2b7605f..8a8ef1cd41ab 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,15 @@
+<a name="21.2.24"></a>
+
+# 21.2.24 (2026-09-10)
+
+### @angular/build
+
+| Commit                                                                                               | Type | Description             |
+| ---------------------------------------------------------------------------------------------------- | ---- | ----------------------- |
+| [dbaadc2f6e](https://github.com/angular/angular-cli/commit/dbaadc2f6e73b611e292b3337066fd5b3b631397) | fix  | update undici to 7.29.1 |
+
+<!-- CHANGELOG SPLIT MARKER -->
+
 <a name="21.2.23"></a>
 
 # 21.2.23 (2026-09-02)
diff --git a/package.json b/package.json
index b4530279b662..7b1c0c6d4254 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@angular/devkit-repo",
-  "version": "21.2.23",
+  "version": "21.2.24",
   "private": true,
   "description": "Software Development Kit for Angular",
   "keywords": [