# Currently (2017/2018) it's not possible to change the Ruby 'minor' version (eg. 2.3 => 2.4) using the web console
# However, it's possible using the 'awscli' tool.

brew install awscli # pip install awscli
aws elasticbeanstalk update-environment \
  --solution-stack-name "Puma with Ruby 2.5 running on 64bit Amazon Linux/2.8.1" \
  --application-name "Enconta" --environment-name "Staging" --region "us-west-2" --profile enconta