source "https://rubygems.org" gem "jekyll", "~> 3.9" gem "jekyll-sitemap", "~> 1.4" gem "jekyll-gist", "~> 1.5" gem "jekyll-feed", "~> 0.15.0" gem "jekyll-data", "~> 1.1" gem "kramdown-parser-gfm", "~> 1.1" gem "webrick", "~> 1.7" gemspec