Amazon ElastiCache for Redis adds support for the latest Redis open source version 5.0.4. This is a bug fix release with various improvements in stability and memory management.
For the full list of improvements in Amazon ElastiCache for Redis 5.0.4 click here. Redis 5.0.4 support is available in all AWS regions.
To get started on ElastiCache for Redis cluster with engine version 5.0.4 log on to AWS Management Console.
from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/05/elasticache-redis-5-0-4/