diff --git a/CHANGELOG.md b/CHANGELOG.md
index fd281b10f8..8ca605ea58 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 IMPROVEMENTS:
 
   * provider/aws: Add new parameters `az_mode` and `availabiliy_zone(s)` in ElastiCache [GH-4631]
+  * provider/aws: Allow ap-northeast-2 (Seoul) as valid region [GH-4637]
 
 FEATURES: