diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 8c22fc5..904d505 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "2.37.0"
+  ".": "2.38.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1c3f07d..b82db0b 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).
 
+## [2.38.0](https://github.com/launchdarkly/sdk-test-harness/compare/v2.37.0...v2.38.0) (2026-07-08)
+
+
+### Features
+
+* Add contract tests for client-side secure mode hash (h query param) ([#358](https://github.com/launchdarkly/sdk-test-harness/issues/358)) ([16ed598](https://github.com/launchdarkly/sdk-test-harness/commit/16ed5984cecd66ddb8066e34c5465ec2efb97d5c))
+
 ## [2.37.0](https://github.com/launchdarkly/sdk-test-harness/compare/v2.36.0...v2.37.0) (2026-06-08)
 
 
diff --git a/main.go b/main.go
index 9bac3d8..c7c1a2c 100644
--- a/main.go
+++ b/main.go
@@ -18,7 +18,7 @@ import (
 )
 
 const defaultPort = 8111
-const versionString string = "2.37.0" // {{ x-release-please-version }}
+const versionString string = "2.38.0" // {{ x-release-please-version }}
 
 func main() {
 	fmt.Printf("sdk-test-harness v%s\n", strings.TrimSpace(versionString))