diff --git a/CHANGELOG.md b/CHANGELOG.md
index da7c0415e..753176f7d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 See the [releases page](https://github.com/github/codeql-action/releases) for the relevant changes to the CodeQL CLI and language packs.
 
+## [UNRELEASED]
+
+No user facing changes.
+
 ## 2.21.4 - 14 Aug 2023
 
 - Update default CodeQL bundle version to 2.14.2. [#1831](https://github.com/github/codeql-action/pull/1831)
diff --git a/package-lock.json b/package-lock.json
index ebfad1bf5..df249ea8e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "codeql",
-  "version": "2.21.4",
+  "version": "2.21.5",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "codeql",
-      "version": "2.21.4",
+      "version": "2.21.5",
       "license": "MIT",
       "dependencies": {
         "@actions/artifact": "^1.1.1",
diff --git a/package.json b/package.json
index db0ce9012..e9db4ab91 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "codeql",
-  "version": "2.21.4",
+  "version": "2.21.5",
   "private": true,
   "description": "CodeQL action",
   "scripts": {