diff --git a/CHANGELOG.md b/CHANGELOG.md
index 96023ed8a..2f6317eac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,18 @@
 
 [1]: https://www.npmjs.com/package/@google-cloud/pubsub?activeTab=versions
 
+## [4.9.0](https://github.com/googleapis/nodejs-pubsub/compare/v4.8.0...v4.9.0) (2024-11-12)
+
+
+### Features
+
+* Add IngestionFailureEvent to the external proto ([#1984](https://github.com/googleapis/nodejs-pubsub/issues/1984)) ([7075430](https://github.com/googleapis/nodejs-pubsub/commit/70754309fb600c54d0a573f2d49ad4c419577550))
+
+
+### Bug Fixes
+
+* KiB, not MiB for ack size limits ([#1999](https://github.com/googleapis/nodejs-pubsub/issues/1999)) ([798270d](https://github.com/googleapis/nodejs-pubsub/commit/798270db9c5ef71f75c3e24e70d9592bbd068212))
+
 ## [4.8.0](https://github.com/googleapis/nodejs-pubsub/compare/v4.7.2...v4.8.0) (2024-10-15)
 
 
diff --git a/package.json b/package.json
index 279df9e5c..c31ea1b14 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@google-cloud/pubsub",
   "description": "Cloud Pub/Sub Client Library for Node.js",
-  "version": "4.8.0",
+  "version": "4.9.0",
   "license": "Apache-2.0",
   "author": "Google Inc.",
   "engines": {
diff --git a/samples/package.json b/samples/package.json
index 083fd4e4a..87fcd15ca 100644
--- a/samples/package.json
+++ b/samples/package.json
@@ -22,7 +22,7 @@
   },
   "dependencies": {
     "@google-cloud/opentelemetry-cloud-trace-exporter": "^2.0.0",
-    "@google-cloud/pubsub": "^4.8.0",
+    "@google-cloud/pubsub": "^4.9.0",
     "@google-cloud/storage": "^7.11.1",
     "@opentelemetry/api": "^1.6.0",
     "@opentelemetry/resources": "^1.17.0",