diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 9395a03..d742a39 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "6.4.4"
+  ".": "6.5.0"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5fa31c2..d9d2615 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [6.5.0](https://github.com/trycourier/courier-ruby/compare/v6.4.4...v6.5.0) (2026-09-04)
+
+
+### Features
+
+* **api:** document the expiry_date contract and allow boolean patch values ([#148](https://github.com/trycourier/courier-ruby/issues/148)) ([191cec0](https://github.com/trycourier/courier-ruby/commit/191cec0ef235a855add991f9b935c1d90e0239f8))
+
 ## [6.4.4](https://github.com/trycourier/courier-ruby/compare/v6.4.3...v6.4.4) (2026-09-03)
 
 
diff --git a/README.md b/README.md
index 9718d48..40dcff2 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ Add the gem to your `Gemfile`:
 <!-- x-release-please-start-version -->
 
 ```ruby
-gem "trycourier", "~> 6.4.4"
+gem "trycourier", "~> 6.5.0"
 ```
 
 <!-- x-release-please-end -->
diff --git a/lib/courier/version.rb b/lib/courier/version.rb
index 471aa63..9d4d404 100644
--- a/lib/courier/version.rb
+++ b/lib/courier/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Courier
-  VERSION = "6.4.4"
+  VERSION = "6.5.0"
 end