diff --git a/CHANGELOG.md b/CHANGELOG.md
index 845cbbfba7..46e36d58d0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,12 @@ More expansive patch notes and explanations may be found in the specific [pathfi
 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).
 
+## Unreleased
+
+### Changed
+
+- Cairo 0 class definition size is now capped at 4 MiB.
+
 ## [0.15.2] - 2024-12-04
 
 ### Fixed