diff --git a/CHANGELOG.md b/CHANGELOG.md
index f93d6b340..9a6843fac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 All notable changes to this project will be documented in this file. For info on how to format all future additions to this file please reference [Keep A Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## [Unreleased]
+
+### Changed
+
+- Improved handling of multipart requests. `rack.input` is now optional, and if missing, will raise an error which includes `module Rack::BadRequest`. Several other exceptions also include this module. A `Rack::ErrorHandler` middleware is introduced to convert this into 400 Bad Request responses. Other exceptions are converted to 500 Internal Server Error. ([#1997](https://github.com/rack/rack/pull/1997), [@ioquatix])
+
 ## [3.0.3] - 2022-12-07
 
 ### Fixed