Specifying a Ruby Version
Render’s default Ruby version is listed alongside other natively supported languages in this table.
You can customize the Ruby version for your app by adding a .ruby-version
file or by setting the ruby
directive in your Gemfile
. If a version is set in both places .ruby-version
will take priority.
To avoid any version mismatch confusion it can help to a single version set in .ruby-version
and have the Gemfile
read from it, for example:
Your .ruby-version
could look like this:
3.1.2
Then the Gemfile
can reference .ruby-version
via the ruby
directive:
ruby File.read('.ruby-version').strip