diff --git a/CHANGELOG.asciidoc b/CHANGELOG.asciidoc
index a31f9316a0..45096350a7 100644
--- a/CHANGELOG.asciidoc
+++ b/CHANGELOG.asciidoc
@@ -33,19 +33,18 @@ Notes:
 
 See the <<upgrade-to-v4>> guide.
 
-==== Unreleased
-
-[float]
-===== Breaking changes
+[[release-notes-4.9.0]]
+==== 4.9.0 - 2024/12/09
 
 [float]
 ===== Features
 
-* add support for `undici` v7. ({pull}4336[#4336])
+* Add support for `undici` v7. ({pull}4336[#4336])
 
 [float]
 ===== Bug fixes
 
+* Fix to support a internal refactor in `mysql2` v3.11.5. ({pull}4334[#4334])
 * Guard against a possible encoding error of tracing data in the APM client,
   before it is sent. It is *possible* this could wedge the APM client,
   resulting in the APM agent no longer sending tracing data.
diff --git a/package-lock.json b/package-lock.json
index 59caa81736..be404e0bc1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "elastic-apm-node",
-  "version": "4.8.1",
+  "version": "4.9.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "elastic-apm-node",
-      "version": "4.8.1",
+      "version": "4.9.0",
       "license": "BSD-2-Clause",
       "dependencies": {
         "@elastic/ecs-pino-format": "^1.5.0",
diff --git a/package.json b/package.json
index d9172d06b6..48f5684ecd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "elastic-apm-node",
-  "version": "4.8.1",
+  "version": "4.9.0",
   "description": "The official Elastic APM agent for Node.js",
   "type": "commonjs",
   "main": "index.js",