Honestly, I have no idea. All of our development efforts were geared towards Rails 3 & 4. If you have any issues and want to email us (email below) we can try t

Honestly, I have no idea. All of our development efforts were geared towards Rails 3 & 4. If you have any issues and want to email us (email below) we can try to help out, but I can't really promise anything for 2.3. Our email address is support [at] upmin.com