This document lists the new features, enhancements, fixed issues, and removed or deprecated features for Hazelcast Platform 5.4.1 release. The numbers in the square brackets refer to issues in Hazelcast's public and internal GitHub repositories.

## Enhancements

* Introduced a new YAML configuration option for User Code Namespaces that enables multiple name spaces to be defined within a `name-spaces` collection [#2485]. 

## Fixes

* Exclude non-WAN address aliases during WAN MemberHandshake [#2418]
* Fix NullPointerException in NotifyMemberShutdownOperation during RU [#1727]
* JobConfig#add not using derived id for some resources [#1723]
* Vulnerabilities in protobuf-java 3.19.4 and hadoop-shaded-protobuf_3_7-1.1.1 [#22541]
* Vulnerability in hadoop-shaded-guava-1.1.1.jar (shaded: com.google.guava:guava:30.1.1-jre) [#24981]
* Vulnerability in aircompressor-0.21 [#26354]
