How do I specify my app's Ruby version?

You have two options:

• Write your Ruby version to a file called .ruby-version in the root of your git repo

  • echo "2.6.3 > .ruby-version"

  • git add .ruby-version

  • git commit -m "Set ruby version"

• Or you can manage it in your Gemfile

  • ruby "2.6.3"

  • bundle

  • git add Gemfile Gemfile.lock

  • git commit -m "Set ruby version"

For legacy versions of Ruby, we only support the latest patch versions.

Here's a list of supported Ruby versions that are currently supported:

• 2.6.3

• 2.6.2

• 2.6.1

• 2.6.0

• 2.5.5

• 2.5.4

• 2.5.3

• 2.5.1

• 2.5.0

• 2.4.6

• 2.4.5

• 2.4.4

• 2.4.3

• 2.4.2

• 2.4.1

• 2.4.0

• 2.3.8

• 2.3.7

• 2.3.6

• 2.3.5

• 2.3.4

• 2.3.3

• 2.3.2

• 2.3.1

• 2.3.0

• 2.2.10

• 2.2.9

• 2.2.8

• 2.2.7

• 2.2.6

• 2.0.0

• 1.9.3

• 1.8.7