diff --git a/CHANGELOG.md b/CHANGELOG.md
index 01e76b3ba..610248f02 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,10 @@
 
 ## Main (unreleased)
 
-- Exclude development-only files from the packaged buildpack
+## v261 (2023/11/02)
+
+- JRuby 9.4.5.0 is now available
+- JRuby 9.3.13.0 is now available
 - Default Node.js version now 20.9.0
 
 ## v260 (2023/10/23)
diff --git a/README.md b/README.md
index 0b6ef1413..e300de875 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,7 @@ For more information about using Ruby and buildpacks on Heroku, see these Dev Ce
 
 - [Heroku Ruby Support](https://devcenter.heroku.com/articles/ruby-support)
 - [Getting Started with Ruby on Heroku](https://devcenter.heroku.com/articles/getting-started-with-ruby)
-- [Getting Started with Rails 4 on Heroku](https://devcenter.heroku.com/articles/getting-started-with-rails4)
+- [Getting Started with Rails 7 on Heroku](https://devcenter.heroku.com/articles/getting-started-with-rails7)
 - [Buildpacks](https://devcenter.heroku.com/articles/buildpacks)
 - [Buildpack API](https://devcenter.heroku.com/articles/buildpack-api)
 
diff --git a/changelogs/v261/jruby_9.3.13.0.md b/changelogs/v261/jruby_9.3.13.0.md
new file mode 100644
index 000000000..45082f69e
--- /dev/null
+++ b/changelogs/v261/jruby_9.3.13.0.md
@@ -0,0 +1,10 @@
+## JRuby version 9.3.13.0 is now available
+
+[JRuby v9.3.13.0](/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 "2.6.8", engine: "jruby", engine_version: "9.3.13.0"
+```
+
+The JRuby release notes can be found on the [JRuby website](https://www.jruby.org/news).
diff --git a/changelogs/v261/jruby_9.4.5.0.md b/changelogs/v261/jruby_9.4.5.0.md
new file mode 100644
index 000000000..e69de29bb
diff --git a/changelogs/v261/node_20_9_0.md b/changelogs/v261/node_20_9_0.md
new file mode 100644
index 000000000..d260909bd
--- /dev/null
+++ b/changelogs/v261/node_20_9_0.md
@@ -0,0 +1,8 @@
+## Ruby apps now default to Node version 20.9.0
+
+Applications using the `heroku/ruby` buildpack that do not already have `node` installed by another buildpack (such as the `heroku/nodejs`
+buildpack) will now receive:
+
+- Node.js version 20.9.0 (was previously 16.18.1)
+
+These versions and instructions on how to specify a specific version of these binaries can be found on the [installed binaries section of the Heroku Ruby Support page](https://devcenter.heroku.com/articles/ruby-support#installed-binaries).
diff --git a/lib/language_pack/version.rb b/lib/language_pack/version.rb
index 9888744be..32d3f4d25 100644
--- a/lib/language_pack/version.rb
+++ b/lib/language_pack/version.rb
@@ -2,6 +2,6 @@
 
 module LanguagePack
   class LanguagePack::Base
-    BUILDPACK_VERSION = "v260"
+    BUILDPACK_VERSION = "v261"
   end
 end