The Wayback Machine - https://web.archive.org/web/20160330193858/https://pages.github.com/versions/
Pages Help

Dependency versions

GitHub Pages uses the following dependencies and versions:

Dependency Version
jekyll 3.0.3
github-pages-health-check 1.1.0
github-pages 67
html-pipeline 2.3.0
jekyll-coffeescript 1.0.1
jekyll-feed 0.4.0
jekyll-gist 1.4.0
jekyll-github-metadata 1.10.0
jekyll-mentions 1.1.2
jekyll-paginate 1.1.0
jekyll-redirect-from 0.10.0
jekyll-sass-converter 1.3.0
jekyll-seo-tag 1.3.3
jekyll-sitemap 0.10.0
jekyll-textile-converter 0.1.0
jemoji 0.6.2
kramdown 1.10.0
liquid 3.0.6
rdiscount 2.1.8
redcarpet 3.3.3
RedCloth 4.2.9
rouge 1.10.1
ruby 2.1.7
safe_yaml 1.0.4
sass 3.4.22

Programmatic access

Want a more programmatic way to keep your local version of Jekyll up to date? All dependencies are bundled within the GitHub Pages Ruby gem, or are available programmatically via pages.github.com/versions.json