diff --git a/CHANGELOG.md b/CHANGELOG.md
index 77591e4..49ec006 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -33,6 +33,7 @@ drc restart migrations; drc logs -ft --tail=200 migrations
 - Add URI to resource's organization responses
 - Fix query for organizations report [OP-3636]
 - Bump report-generation-service to most recent version
+- Write migration to harmonize date formats of change events [OP-3559]
 ### Deploy notes
 ```
 drc pull deltanotifier; drc up -d deltanotifier