diff --git a/History.md b/History.md
index fb35777130..924f10537b 100644
--- a/History.md
+++ b/History.md
@@ -1,7 +1,7 @@
-unreleased
+4.21.1 / 2024-10-08
 ==========
 
-* Backported a fix for CVE-2024-47764
+* Backported a fix for [CVE-2024-47764](https://nvd.nist.gov/vuln/detail/CVE-2024-47764)
 
 4.21.0 / 2024-09-11
 ==========
diff --git a/package.json b/package.json
index 9905aac85a..a36e593c31 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "express",
   "description": "Fast, unopinionated, minimalist web framework",
-  "version": "4.21.0",
+  "version": "4.21.1",
   "author": "TJ Holowaychuk <tj@vision-media.ca>",
   "contributors": [
     "Aaron Heckmann <aaron.heckmann+github@gmail.com>",