Since I always forget.

Update ruby environment

  1. brew update
  2. brew upgrade (to upgrade rbenv and ruby-build to the latest)
  3. Check latest ruby versions: rbenv install -l
  4. Install latest version: rbenv install 3.0.2
  5. Set as default: rbenv global 3.0.2
  6. gem install bundler jekyll thor stringex

Update Jekyll

Follow instructions on the site. Generally update the versions in the gemfile and run bundle install (I think).