Gemfile

source 'https://rubygems.org'
# Explicitly require >=232 to make sure liquid >=4.0.4 is used, which has a fix for "Liquid Exception: undefined method 'tainted?' for an instance of String". See <https://github.com/jekyll/jekyll/issues/9233>.
gem 'github-pages', '>=232'

# Require some gems that are not part of the core anymore in recent Ruby versions.
gem 'csv'
gem 'base64'
gem 'bigdecimal'

gem 'webrick'