From 12407675aa4728656e9847c3bd74e2b9f292c936 Mon Sep 17 00:00:00 2001
From: "heroku-linguist[bot]"
 <136119646+heroku-linguist[bot]@users.noreply.github.com>
Date: Wed, 7 Jan 2026 13:43:18 +0000
Subject: [PATCH] Prepare release v4.0.0

## heroku/python

### Removed

- Removed support for Python 3.9. ([#488](https://github.com/heroku/buildpacks-python/pull/488))

### Changed

- Updated pip from 25.2 to 25.3. ([#453](https://github.com/heroku/buildpacks-python/pull/453))
---
 CHANGELOG.md   | 5 ++++-
 buildpack.toml | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6f011d4..3081cbf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [4.0.0] - 2026-01-07
+
 ### Removed
 
 - Removed support for Python 3.9. ([#488](https://github.com/heroku/buildpacks-python/pull/488))
@@ -543,7 +545,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Initial implementation. ([#3](https://github.com/heroku/buildpacks-python/pull/3))
 
-[unreleased]: https://github.com/heroku/buildpacks-python/compare/v3.0.2...HEAD
+[unreleased]: https://github.com/heroku/buildpacks-python/compare/v4.0.0...HEAD
+[4.0.0]: https://github.com/heroku/buildpacks-python/compare/v3.0.2...v4.0.0
 [3.0.2]: https://github.com/heroku/buildpacks-python/compare/v3.0.1...v3.0.2
 [3.0.1]: https://github.com/heroku/buildpacks-python/compare/v3.0.0...v3.0.1
 [3.0.0]: https://github.com/heroku/buildpacks-python/compare/v2.8.1...v3.0.0
diff --git a/buildpack.toml b/buildpack.toml
index fe77394..4c082e0 100644
--- a/buildpack.toml
+++ b/buildpack.toml
@@ -2,7 +2,7 @@ api = "0.10"
 
 [buildpack]
 id = "heroku/python"
-version = "3.0.2"
+version = "4.0.0"
 name = "Heroku Python"
 homepage = "https://github.com/heroku/buildpacks-python"
 description = "Heroku's buildpack for Python applications."