diff --git a/Gemfile b/Gemfile
index 37f5eaa..2940345 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,2 +1,50 @@
 source 'https://rubygems.org'
-gem 'github-pages', group: :jekyll_plugins
+# gem 'github-pages', group: :jekyll_plugins
+gem 'activesupport'
+# gem 'github-pages-health-check'
+gem 'jekyll'
+group :jekyll_plugins do
+  gem 'jekyll-avatar'
+  gem 'jekyll-coffeescript'
+  gem 'jekyll-commonmark-ghpages'
+  gem 'jekyll-default-layout'
+  gem 'jekyll-feed'
+  gem 'jekyll-gist'
+  gem 'jekyll-github-metadata'
+  # gem 'jekyll-mentions'
+  gem 'jekyll-optional-front-matter'
+  gem 'jekyll-paginate'
+  gem 'jekyll-readme-index'
+  gem 'jekyll-redirect-from'
+  gem 'jekyll-relative-links'
+  gem 'jekyll-remote-theme'
+  gem 'jekyll-seo-tag'
+  gem 'jekyll-sitemap'
+  gem 'jekyll-titles-from-headings'
+  gem 'jemoji'
+end
+gem 'jekyll-sass-converter'
+# themes
+gem 'jekyll-swiss'
+gem 'jekyll-theme-architect'
+gem 'jekyll-theme-cayman'
+gem 'jekyll-theme-dinky'
+gem 'jekyll-theme-hacker'
+gem 'jekyll-theme-leap-day'
+gem 'jekyll-theme-merlot'
+gem 'jekyll-theme-midnight'
+gem 'jekyll-theme-minimal'
+gem 'jekyll-theme-modernist'
+gem 'jekyll-theme-primer'
+gem 'jekyll-theme-slate'
+gem 'jekyll-theme-tactile'
+gem 'jekyll-theme-time-machine'
+gem 'minima'
+# end themes
+gem 'kramdown'
+gem 'liquid'
+gem 'listen'
+gem 'mercenary'
+gem 'rouge'
+# gem 'ruby-oembed'
+gem 'terminal-table'
diff --git a/Gemfile.lock b/Gemfile.lock
index 4e2a80c..b03cc8a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -24,56 +24,6 @@ GEM
     ffi (1.9.18)
     forwardable-extended (2.6.0)
     gemoji (3.0.0)
-    github-pages (172)
-      activesupport (= 4.2.9)
-      github-pages-health-check (= 1.3.5)
-      jekyll (= 3.6.2)
-      jekyll-avatar (= 0.5.0)
-      jekyll-coffeescript (= 1.0.2)
-      jekyll-commonmark-ghpages (= 0.1.3)
-      jekyll-default-layout (= 0.1.4)
-      jekyll-feed (= 0.9.2)
-      jekyll-gist (= 1.4.1)
-      jekyll-github-metadata (= 2.9.3)
-      jekyll-mentions (= 1.2.0)
-      jekyll-optional-front-matter (= 0.3.0)
-      jekyll-paginate (= 1.1.0)
-      jekyll-readme-index (= 0.2.0)
-      jekyll-redirect-from (= 0.12.1)
-      jekyll-relative-links (= 0.5.2)
-      jekyll-remote-theme (= 0.2.3)
-      jekyll-sass-converter (= 1.5.0)
-      jekyll-seo-tag (= 2.3.0)
-      jekyll-sitemap (= 1.1.1)
-      jekyll-swiss (= 0.4.0)
-      jekyll-theme-architect (= 0.1.0)
-      jekyll-theme-cayman (= 0.1.0)
-      jekyll-theme-dinky (= 0.1.0)
-      jekyll-theme-hacker (= 0.1.0)
-      jekyll-theme-leap-day (= 0.1.0)
-      jekyll-theme-merlot (= 0.1.0)
-      jekyll-theme-midnight (= 0.1.0)
-      jekyll-theme-minimal (= 0.1.0)
-      jekyll-theme-modernist (= 0.1.0)
-      jekyll-theme-primer (= 0.5.2)
-      jekyll-theme-slate (= 0.1.0)
-      jekyll-theme-tactile (= 0.1.0)
-      jekyll-theme-time-machine (= 0.1.0)
-      jekyll-titles-from-headings (= 0.5.0)
-      jemoji (= 0.8.1)
-      kramdown (= 1.14.0)
-      liquid (= 4.0.0)
-      listen (= 3.0.6)
-      mercenary (~> 0.3)
-      minima (= 2.1.1)
-      rouge (= 2.2.1)
-      terminal-table (~> 1.4)
-    github-pages-health-check (1.3.5)
-      addressable (~> 2.3)
-      net-dns (~> 0.8)
-      octokit (~> 4.0)
-      public_suffix (~> 2.0)
-      typhoeus (~> 0.7)
     html-pipeline (2.7.1)
       activesupport (>= 2)
       nokogiri (>= 1.4)
@@ -111,10 +61,6 @@ GEM
     jekyll-github-metadata (2.9.3)
       jekyll (~> 3.1)
       octokit (~> 4.0, != 4.4.0)
-    jekyll-mentions (1.2.0)
-      activesupport (~> 4.0)
-      html-pipeline (~> 2.3)
-      jekyll (~> 3.0)
     jekyll-optional-front-matter (0.3.0)
       jekyll (~> 3.0)
     jekyll-paginate (1.1.0)
@@ -195,7 +141,6 @@ GEM
       jekyll (~> 3.3)
     minitest (5.10.3)
     multipart-post (2.0.0)
-    net-dns (0.8.0)
     nokogiri (1.8.1)
       mini_portile2 (~> 2.3.0)
     octokit (4.7.0)
@@ -232,7 +177,47 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
-  github-pages
+  activesupport
+  jekyll
+  jekyll-avatar
+  jekyll-coffeescript
+  jekyll-commonmark-ghpages
+  jekyll-default-layout
+  jekyll-feed
+  jekyll-gist
+  jekyll-github-metadata
+  jekyll-optional-front-matter
+  jekyll-paginate
+  jekyll-readme-index
+  jekyll-redirect-from
+  jekyll-relative-links
+  jekyll-remote-theme
+  jekyll-sass-converter
+  jekyll-seo-tag
+  jekyll-sitemap
+  jekyll-swiss
+  jekyll-theme-architect
+  jekyll-theme-cayman
+  jekyll-theme-dinky
+  jekyll-theme-hacker
+  jekyll-theme-leap-day
+  jekyll-theme-merlot
+  jekyll-theme-midnight
+  jekyll-theme-minimal
+  jekyll-theme-modernist
+  jekyll-theme-primer
+  jekyll-theme-slate
+  jekyll-theme-tactile
+  jekyll-theme-time-machine
+  jekyll-titles-from-headings
+  jemoji
+  kramdown
+  liquid
+  listen
+  mercenary
+  minima
+  rouge
+  terminal-table
 
 BUNDLED WITH
    1.15.4