diff --git a/CHANGELOG.md b/CHANGELOG.md
index 01cafca..dd28130 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## [v1.9.0](https://github.com/buildkite/buildkite-agent-scaler/tree/v1.9.0) (2024-07-29)
+[Full Changelog](https://github.com/buildkite/buildkite-agent-scaler/compare/v1.8.0...v1.9.0)
+
+### Changed
+- Enable subnet and security group configuration in Cloudformation [#191](https://github.com/buildkite/buildkite-agent-scaler/pull/191) (@bnovick)
+
 ## [v1.8.0](https://github.com/buildkite/buildkite-agent-scaler/tree/v1.8.0) (2024-07-18)
 [Full Changelog](https://github.com/buildkite/buildkite-agent-scaler/compare/v1.7.0...v1.8.0)
 
diff --git a/version/version.go b/version/version.go
index b9f6a04..5c1b20c 100644
--- a/version/version.go
+++ b/version/version.go
@@ -1,7 +1,7 @@
 package version
 
 // Version the library version number
-const Version = "1.8.0"
+const Version = "1.9.0"
 
 // The build number
 var Build string