diff --git a/.changesets/don-t-start-for-sinatra-if-already-started.md b/.changesets/don-t-start-for-sinatra-if-already-started.md
deleted file mode 100644
index 6224cafec..000000000
--- a/.changesets/don-t-start-for-sinatra-if-already-started.md
+++ /dev/null
@@ -1,7 +0,0 @@
----
-bump: patch
-type: fix
----
-
-Fix issue with AppSignal getting stuck in a boot loop when loading the Sinatra integration with: `require "appsignal/integrations/sinatra"`
-This could happen in nested applications, like a Sinatra app in a Rails app. It will now use the first config AppSignal starts with.
diff --git a/.changesets/improve-mounted-sinatra-apps-in-rails-apps-instrumentation.md b/.changesets/improve-mounted-sinatra-apps-in-rails-apps-instrumentation.md
deleted file mode 100644
index 2676b871d..000000000
--- a/.changesets/improve-mounted-sinatra-apps-in-rails-apps-instrumentation.md
+++ /dev/null
@@ -1,6 +0,0 @@
----
-bump: patch
-type: change
----
-
-Improve instrumentation for mounted Sinatra apps in Rails apps. The sample reported for the Sinatra request will now include the time spent in Rails and its middleware.
diff --git a/.changesets/report-sidekiq-exceptions-on-discard.md b/.changesets/report-sidekiq-exceptions-on-discard.md
deleted file mode 100644
index 0dca3a2af..000000000
--- a/.changesets/report-sidekiq-exceptions-on-discard.md
+++ /dev/null
@@ -1,6 +0,0 @@
----
-bump: minor
-type: add
----
-
-Report Sidekiq errors when a job is dead/discarded. Configure the new `sidekiq_report_errors` config option to "discard" to only report errors when the job is not retried further.
diff --git a/.changesets/support-nested-genericinstrumentation-middleware.md b/.changesets/support-nested-genericinstrumentation-middleware.md
deleted file mode 100644
index a5a3a2a36..000000000
--- a/.changesets/support-nested-genericinstrumentation-middleware.md
+++ /dev/null
@@ -1,6 +0,0 @@
----
-bump: patch
-type: change
----
-
-Improve support for instrumentation of nested pure Rack and Sinatra apps. It will now report more of the request's duration and events. This also improves support for apps that have multiple Rack GenericInstrumentation or SinatraInstrumentation middlewares.
diff --git a/.changesets/support-nested-rack-eventhandlers.md b/.changesets/support-nested-rack-eventhandlers.md
deleted file mode 100644
index 3b4b3117b..000000000
--- a/.changesets/support-nested-rack-eventhandlers.md
+++ /dev/null
@@ -1,6 +0,0 @@
----
-bump: patch
-type: change
----
-
-Support apps that have multiple Appsignal::Rack::EventHandler-s in the middleware stack.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d6437f737..bdb5307cc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,24 @@
 # AppSignal for Ruby gem Changelog
 
+## 3.9.0
+
+_Published on 2024-06-21._
+
+### Added
+
+- [500b2b4b](https://github.com/appsignal/appsignal-ruby/commit/500b2b4bb57a29663a197ff063c672e6b0c44769) minor - Report Sidekiq errors when a job is dead/discarded. Configure the new `sidekiq_report_errors` config option to "discard" to only report errors when the job is not retried further.
+
+### Changed
+
+- [c76952ff](https://github.com/appsignal/appsignal-ruby/commit/c76952ff5c8bd6e9d1d841a3aeb600b27494bb43) patch - Improve instrumentation for mounted Sinatra apps in Rails apps. The sample reported for the Sinatra request will now include the time spent in Rails and its middleware.
+- [661b8e08](https://github.com/appsignal/appsignal-ruby/commit/661b8e08de962e8f95326f0bbc9c0061b8cc0a62) patch - Support apps that have multiple Appsignal::Rack::EventHandler-s in the middleware stack.
+- [7382afa3](https://github.com/appsignal/appsignal-ruby/commit/7382afa3e9c89ce0c9f3430fb71825736e484e82) patch - Improve support for instrumentation of nested pure Rack and Sinatra apps. It will now report more of the request's duration and events. This also improves support for apps that have multiple Rack GenericInstrumentation or SinatraInstrumentation middlewares.
+
+### Fixed
+
+- [2478eb19](https://github.com/appsignal/appsignal-ruby/commit/2478eb19f51c18433785347d02af18f405eeeabd) patch - Fix issue with AppSignal getting stuck in a boot loop when loading the Sinatra integration with: `require "appsignal/integrations/sinatra"`
+  This could happen in nested applications, like a Sinatra app in a Rails app. It will now use the first config AppSignal starts with.
+
 ## 3.8.1
 
 _Published on 2024-06-17._
diff --git a/lib/appsignal/version.rb b/lib/appsignal/version.rb
index 58d092909..d3618d89b 100644
--- a/lib/appsignal/version.rb
+++ b/lib/appsignal/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Appsignal
-  VERSION = "3.8.1"
+  VERSION = "3.9.0"
 end