AWS is updating brokered RDS for PostgreSQL instances using PostgreSQL version 9.5 beginning this coming Monday, February 15th, 2021. We are reaching out to AWS and directly to affected customers to try and reduce any unanticipated impacts caused by these upgrades. You can find additional background from AWS here:
https://forums.aws.amazon.com/ann.jspa?annID=8176Prior to this date, the most effective way to ensure that an upgrade to a more recent version of PostgreSQL won’t adversely impact your applications is to upgrade to a newer version in a test environment and ensure your apps work properly. Given the short timeline for the change announced by AWS, this should be done as expeditiously as possible. If you have questions or need assistance with this please reach out to
support@cloud.gov.