diff --git a/changelog.md b/changelog.md
index c32daae..d60853b 100644
--- a/changelog.md
+++ b/changelog.md
@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.9.1] - 2023-03-14
+### Changes
+- bump zlib to 1.2.13
+- recompiled builds with --with-http_auth_request_module
+
 ## [1.9] - 2022-06-21
 ### Changes
 - If a Ruby installation is not found (required for the ERB templating feature), this buildpack will now install its own, to ensure it works on Heroku-22.
@@ -30,6 +35,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [1.5.2] - 2021-07-29
 ### Changes
 - [CODEOWNERS] Add ECCN
+- Add --with-http_auth_request_module to build
 
 ## [1.5.1] - 2020-08-22
 ### Changes