#Admins if you're on a standalone install (not sure how this works with docker) and are updating your server to the latest rc.
Make sure you upgrade ruby-build since mastodon uses 2.5.0 now.
cd /home/mastodon/.rbenv/plugins/ruby-build && git pull && cd -
Then
mastodon@localhost:~/live$ rbenv install 2.5.0
mastodon@localhost:~/live$ gem install bundler
Then you should be able to proceed with the usual upgrade commands:
bundle install --deployment --without development test
.....
@href it's hardset within .ruby-version and bundle install won't run without it
@dewb Is there an HARD dependency on 2.5.x ?