diff --git a/CHANGELOG.md b/CHANGELOG.md
index e5040fe56..143188f0b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,8 @@ All notable changes to this project will be documented in this file. For info on
 
 ## Unreleased
 
+## [2.2.9] - 2023-03-21
+
 - Return empty when parsing a multi-part POST with only one end delimiter. ([#2104](https://github.com/rack/rack/pull/2104), [@alpaca-tc])
 
 ## [2.2.8] - 2023-07-31
diff --git a/lib/rack/version.rb b/lib/rack/version.rb
index e0035a937..8518b4b90 100644
--- a/lib/rack/version.rb
+++ b/lib/rack/version.rb
@@ -20,7 +20,7 @@ def self.version
     VERSION.join(".")
   end
 
-  RELEASE = "2.2.8.1"
+  RELEASE = "2.2.9"
 
   # Return the Rack release as a dotted string.
   def self.release