diff --git a/gems/aws-sdk-s3/CHANGELOG.md b/gems/aws-sdk-s3/CHANGELOG.md
index f644d6847c5..0e89cee1974 100644
--- a/gems/aws-sdk-s3/CHANGELOG.md
+++ b/gems/aws-sdk-s3/CHANGELOG.md
@@ -1,6 +1,8 @@
 Unreleased Changes
 ------------------
 
+* Feature - Add RBS signatures for customizations of S3.
+
 1.148.0 (2024-04-25)
 ------------------