diff --git a/CHANGELOG.md b/CHANGELOG.md
index f2d49fdff..03e926d72 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@ See the [releases page](https://github.com/github/codeql-action/releases) for th
 
 ## [UNRELEASED]
 
+No user facing changes.
+
+## 2.21.8 - 19 Sep 2023
+
 - Add a deprecation warning for customers using CodeQL version 2.10.4 and earlier. These versions of CodeQL were discontinued on 12 September 2023 alongside GitHub Enterprise Server 3.6, and will be unsupported by the next minor release of the CodeQL Action. [#1884](https://github.com/github/codeql-action/pull/1884)
   - If you are using one of these versions, please update to CodeQL CLI version 2.10.5 or later. For instance, if you have specified a custom version of the CLI using the 'tools' input to the 'init' Action, you can remove this input to use the default version.
   - Alternatively, if you want to continue using a version of the CodeQL CLI between 2.9.5 and 2.10.4, you can replace `github/codeql-action/*@v2` by `github/codeql-action/*@v2.21.7` in your code scanning workflow to ensure you continue using this version of the CodeQL Action.
diff --git a/node_modules/.package-lock.json b/node_modules/.package-lock.json
index cc11ee5c9..787da2bf0 100644
--- a/node_modules/.package-lock.json
+++ b/node_modules/.package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "codeql",
-  "version": "2.21.8",
+  "version": "2.21.9",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
diff --git a/package-lock.json b/package-lock.json
index 826426c82..874a7aca6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "codeql",
-  "version": "2.21.8",
+  "version": "2.21.9",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "codeql",
-      "version": "2.21.8",
+      "version": "2.21.9",
       "license": "MIT",
       "dependencies": {
         "@actions/artifact": "^1.1.2",
diff --git a/package.json b/package.json
index 0c08f5636..f863abeac 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "codeql",
-  "version": "2.21.8",
+  "version": "2.21.9",
   "private": true,
   "description": "CodeQL action",
   "scripts": {