Amazon MSK adds supports for Apache Kafka version 2.5.1
Amazon Managed Streaming for Apache Kafka (Amazon MSK) now supports Apache Kafka version 2.5.1 for new and existing clusters. Apache Kafka 2.5.1 includes several bug fixes and new features, including encryption in-transit support for Apache ZooKeeper and admin clients (KIP-515). For a complete list of improvements and bug fixes, see the Apache Kafka release notes for 2.5.0 and 2.5.1.
Source:: Amazon AWS