Setting Your Ruby Version

Ruby version 3.3.0 is the default for Render services created on or after 2024-03-18.

Set a different Ruby version in any of the following ways (in descending order of precedence):

  • Add a file named .ruby-version to the root of your repo. This file contains a single line with the version to use:

  • Set the ruby directive in your Gemfile.

To avoid version mismatches across environments, you can set your Ruby version in the .ruby-version file, then read the value from that file in your Gemfile:

# Gemfile

History of default Ruby versions

If you don’t set a Ruby version for your service, Render’s default version depends on when you originally created the service:

Service Creation DateDefault Ruby Version
2024-03-18 and later3.3.0
2023-11-01 - 2024-03-183.2.2
Before 2023-11-012.6.8