The first release of the Ruby buildpack after May 11, 2019 will no longer include any versions of Ruby 2.2.x and 2.3.x. These Ruby versions are no longer supported upstream [1]. Please migrate your Ruby apps to supported versions of Ruby before that time.

Note: Unless you are manually specifying a version of Ruby for the buildpack to use, or you have customized your Ruby buildpack, no action is required.

[1] https://www.ruby-lang.org/en/downloads/branches/

Thanks,

Elliott Shanks, CF Buildpacks PM