diff --git a/src/Gemfile b/src/Gemfile
index 84060e5..f0aaa9b 100644
--- a/src/Gemfile
+++ b/src/Gemfile
@@ -1,43 +1,39 @@
 source "https://rubygems.org"
 ruby RUBY_VERSION
 
 # Hello! This is where you manage which Jekyll version is used to run.
 # When you want to use a different version, change it below, save the
 # file and run `bundle install`. Run Jekyll with `bundle exec`, like so:
 #
 #     bundle exec jekyll serve
 #
 # This will help ensure the proper Jekyll version is running.
 # Happy Jekylling!
 
 # jekyll-assets does not support jekyll 4 yet
-gem "jekyll", "~> 3.0"
+gem "jekyll"
 
 # This is the default theme for new Jekyll sites. You may change this to anything you like.
 gem "minima", "~> 2.0"
 
 # not sure why jekyll doesn't generate this dependency automatically
 gem "kramdown-parser-gfm"
 
 # Raise rack dependency version to avoid security issues
 gem "rack", ">= 2.2.3.1"
 
 # Needed by jekyll-assets
 group :jekyll_assets_deps do
-   gem "public_suffix", "< 5.0.0"
-   gem "ruby_dep"
-   gem "rb-inotify"
-   gem "listen"
-   gem "jekyll-watch"
-   gem "json"
+   gem "nokogiri"
+   gem "racc"
 end
 
 # If you want to use GitHub Pages, remove the "gem "jekyll"" above and
 # uncomment the line below. To upgrade, run `bundle update github-pages`.
 # gem "github-pages", group: :jekyll_plugins
 
 # If you have any plugins, put them here!
 group :jekyll_plugins do
-   gem "jekyll-assets", "~> 2.0"
+   gem "jekyll-assets", "~> 3.0"
    gem "font-awesome-sass"
 end
diff --git a/src/Gemfile.lock b/src/Gemfile.lock
index 2057278..5924266 100644
--- a/src/Gemfile.lock
+++ b/src/Gemfile.lock
@@ -1,108 +1,124 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.8.1)
+    activesupport (5.2.8.1)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
+    addressable (2.8.6)
       public_suffix (>= 2.0.2, < 6.0)
     colorator (1.1.0)
-    concurrent-ruby (1.2.2)
+    concurrent-ruby (1.2.3)
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
     eventmachine (1.2.7)
+    execjs (2.9.1)
     extras (0.3.0)
       forwardable-extended (~> 2.5)
-    fastimage (2.2.6)
-    ffi (1.15.5)
-    font-awesome-sass (6.3.0)
+    fastimage (2.3.1)
+    ffi (1.16.3)
+    font-awesome-sass (6.5.2)
       sassc (~> 2.0)
     forwardable-extended (2.6.0)
     http_parser.rb (0.8.0)
-    i18n (1.12.0)
+    i18n (1.14.4)
       concurrent-ruby (~> 1.0)
-    jekyll (3.9.3)
+    jekyll (3.9.5)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
       i18n (>= 0.7, < 2)
       jekyll-sass-converter (~> 1.0)
       jekyll-watch (~> 2.0)
       kramdown (>= 1.17, < 3)
       liquid (~> 4.0)
       mercenary (~> 0.3.3)
       pathutil (~> 0.9)
       rouge (>= 1.7, < 4)
       safe_yaml (~> 1.0)
-    jekyll-assets (2.3.0)
-      concurrent-ruby (~> 1.0)
+    jekyll-assets (3.0.12)
+      activesupport (~> 5.0)
+      execjs (~> 2.7)
       extras (~> 0.2)
       fastimage (~> 2.0, >= 1.8)
-      jekyll (~> 3.1, >= 3.0)
-      pathutil (>= 0.8)
-      rack (> 1, < 3)
-      sprockets (~> 3.3, < 3.8)
+      jekyll (>= 3.5, < 4.0)
+      jekyll-sanity (~> 1.2)
+      liquid-tag-parser (~> 1.0)
+      nokogiri (~> 1.8)
+      pathutil (~> 0.16)
+      sprockets (>= 3.3, < 4.1.beta)
     jekyll-feed (0.17.0)
       jekyll (>= 3.7, < 5.0)
+    jekyll-sanity (1.6.0)
+      jekyll (>= 3.1, < 5.0)
+      pathutil (~> 0.16)
     jekyll-sass-converter (1.5.2)
       sass (~> 3.4)
     jekyll-seo-tag (2.8.0)
       jekyll (>= 3.8, < 5.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    json (2.6.3)
     kramdown (2.4.0)
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     liquid (4.0.4)
-    listen (3.8.0)
+    liquid-tag-parser (1.9.0)
+      extras (~> 0.3)
+      liquid (>= 3.0, < 5.0)
+    listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
     minima (2.5.1)
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
+    minitest (5.22.3)
+    nokogiri (1.16.4-x86_64-linux)
+      racc (~> 1.4)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.7)
-    rack (2.2.6.4)
+    public_suffix (5.0.5)
+    racc (1.7.3)
+    rack (2.2.9)
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rexml (3.2.5)
+    rexml (3.2.6)
     rouge (3.30.0)
-    ruby_dep (1.5.0)
     safe_yaml (1.0.5)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
     sassc (2.4.0)
       ffi (~> 1.9)
-    sprockets (3.7.2)
+    sprockets (4.0.3)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
+    thread_safe (0.3.6)
+    tzinfo (1.2.11)
+      thread_safe (~> 0.1)
 
 PLATFORMS
-  ruby
+  x86_64-linux
 
 DEPENDENCIES
   font-awesome-sass
-  jekyll (~> 3.0)
-  jekyll-assets (~> 2.0)
-  jekyll-watch
-  json
+  jekyll
+  jekyll-assets (~> 3.0)
   kramdown-parser-gfm
-  listen
   minima (~> 2.0)
-  public_suffix (< 5.0.0)
+  nokogiri
+  racc
   rack (>= 2.2.3.1)
-  rb-inotify
-  ruby_dep
 
 RUBY VERSION
-   ruby 2.5.9p229
+   ruby 3.0.4p208
 
 BUNDLED WITH
-   1.16.1
+   2.2.33