diff --git a/CHANGELOG.md b/CHANGELOG.md
index 704300f89..9b22a7ee9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## [Unreleased]
 
+- Ruby 3.3.5 is now available (https://github.com/heroku/heroku-buildpack-ruby/pull/1491)
 
 ## [v278] - 2024-08-05
 
diff --git a/changelogs/unreleased/ruby-3.3.5.md b/changelogs/unreleased/ruby-3.3.5.md
new file mode 100644
index 000000000..abce00f2d
--- /dev/null
+++ b/changelogs/unreleased/ruby-3.3.5.md
@@ -0,0 +1,10 @@
+## Ruby version 3.3.5 is now available
+
+[Ruby v3.3.5](/articles/ruby-support#ruby-versions) is now available on Heroku. To run
+your app using this version of Ruby, add the following `ruby` directive to your Gemfile:
+
+```ruby
+ruby "3.3.5"
+```
+
+For more information on [Ruby 3.3.5, you can view the release announcement](https://www.ruby-lang.org/en/news/).