diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7fd88a8..c91a5ea 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+## 2024-06-24
+
 - The cache is now correctly invalidated if the stack version of an existing cache cannot be determined. ([#133](https://github.com/heroku/heroku-buildpack-apt/pull/133))
 - When the cache is invalidated, all APT-related files are now removed, rather than only some of them. In particular, this means old APT package index files are cleaned up. ([#133](https://github.com/heroku/heroku-buildpack-apt/pull/133))
 - Exclude test/development files from the buildpack archive published to the buildpack registry. ([#135](https://github.com/heroku/heroku-buildpack-apt/pull/135))