Heroku Not Detecting Ruby Version

Question

I put the ruby version 2.3.1 in my gemfile, but Heroku keeps using 2.4.4. How do I make it so Heroku recognizes the version specified in the gemfile?

Answer 1

尝试通过键入heroku运行“ ruby​​ -v”来使用heroku控制台，并给出命令以使用您希望他使用的红宝石版本

Answer 2

You are probably on the heroku-18 stack which it the current default. Please note that Ruby 2.3.x is not available on this stack .

You have two options:

1. Update your Ruby version to a more recent version or
2. Downgrade Heroku to use an older stack.

Given that the maintenance phase for Ruby 2.3.x has ended anyway I would suggest updating our application to use at least Ruby 2.4.4 .