diff --git a/CHANGELOG.md b/CHANGELOG.md
index c1340d3f19..82b49e2e10 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,10 +20,12 @@ BUG FIXES:
 
 S3 BACKEND
 
-Enhancements
+Update Notes
 
 * Moves arguments associated with assuming an IAM role into nested block `assume_role`.
   This deprecates the arguments `role_arn`, `session_name`, `external_id`, `assume_role_duration_seconds`, `assume_role_policy`, `assume_role_policy_arns`, `assume_role_tags`, and `assume_role_transitive_tag_keys`. [GH-33630]
+* Supports the default AWS environment variables for overrding API endpoints: `AWS_ENDPOINT_URL_DYNAMODB`, `AWS_ENDPOINT_URL_IAM`, `AWS_ENDPOINT_URL_S3`, and `AWS_ENDPOINT_URL_STS`.
+  This deprecates the environment variables `AWS_DYNAMODB_ENDPOINT`, `AWS_IAM_ENDPOINT`, `AWS_S3_ENDPOINT`, and `AWS_STS_ENDPOINT`. [GH-33715]
 
 ## Previous Releases