RubyInstaller versions 2.6.4-1, 2.5.6-1 and 2.4.7-1 are released. These are maintenance releases with bug and security fixes.
See ruby-2.4.7 release notes, ruby-2.5.6 release notes and ruby-2.6.4 release notes as well as the RubyInstaller CHANGELOG files for RubyInstaller-2.4.7-1, RubyInstaller-2.5.6-1 and RubyInstaller-2.6.4-1. Bundled OpenSSL versions are updated to 1.0.2s (Ruby-2.4.x) and 1.1.1c (Ruby-2.5+).
All binaries are available in the Download section!