Once we have a secure client-side application, we need to make the tools and information available to allow users to actually verify that the code running in their browser is secure.

Rails Long Term Support

Rails LTS provides security patches for old versions of Ruby on Rails (2.3, 3.2, 4.2 and 5.2)

Prevents you from data breaches and liability risks
Upgrade at your own pace
Works with modern Rubies

cortesi - Host-proof applications: doing it wrong

Rails Long Term Support