diff --git a/CHANGELOG.md b/CHANGELOG.md
index d7fdfc89b..4a2019bef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## main / unreleased
 
 * [FEATURE] Rollout-operator can now "mirror" replicas of statefulset from any reference resource. `status.replicas` field of reference resource is kept up-to-date with current number of replicas in target statefulset. #129
+* [FEATURE] Rollout-operator can optionally delay downscale of statefulset when mirroring replicas from reference resource. Delay is coordinated with downscaled pods via new endpoint that pods must implement. #131
 * [ENHANCEMENT] Update Go to `1.22`. #133
 
 ## v0.13.0