diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index da2177c..02bd31d 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "2.20.0"
+  ".": "2.21.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 14e21b7..1a50646 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 All notable changes to the project will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org).
 
+## [2.21.0](https://github.com/launchdarkly/sdk-test-harness/compare/v2.20.0...v2.21.0) (2024-09-13)
+
+
+### Features
+
+* Add CORS support. ([#232](https://github.com/launchdarkly/sdk-test-harness/issues/232)) ([29364a8](https://github.com/launchdarkly/sdk-test-harness/commit/29364a828da9deb38b45874895338a6693ab3fe0))
+
 ## [2.20.0](https://github.com/launchdarkly/sdk-test-harness/compare/v2.19.0...v2.20.0) (2024-09-05)
 
 
diff --git a/main.go b/main.go
index c5aa776..91bbed8 100644
--- a/main.go
+++ b/main.go
@@ -17,7 +17,7 @@ import (
 )
 
 const defaultPort = 8111
-const versionString string = "2.20.0" // {{ x-release-please-version }}
+const versionString string = "2.21.0" // {{ x-release-please-version }}
 
 func main() {
 	fmt.Printf("sdk-test-harness v%s\n", strings.TrimSpace(versionString))