Addressing CVE-2021-28834

Gemfile

@@ -8,8 +8,8 @@ group :development, :test do
   gem 'jekyll-redirect-from', '~> 0.13.0'
   gem 'jekyll-sitemap', '~> 1.2.0'
   gem 'redcarpet', '~> 3.5.1'
-  gem 'kramdown', '~> 2.3.0'
+  gem 'kramdown', '~> 2.3.1'
   gem 'kramdown-parser-gfm', '~> 1.1.0'
-  gem 'nokogiri', '~> 1.11.0.rc4'
+  gem 'nokogiri', '~> 1.11.1'
   gem "jekyll-last-modified-at", "~> 1.0"
 end

Gemfile.lock

@@ -4,12 +4,12 @@ GEM
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
-    concurrent-ruby (1.1.7)
-    em-websocket (0.5.1)
+    concurrent-ruby (1.1.8)
+    em-websocket (0.5.2)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
     eventmachine (1.2.7)
-    ffi (1.13.1)
+    ffi (1.15.0)
     forwardable-extended (2.6.0)
     http_parser.rb (0.6.0)
     i18n (0.9.5)
@@ -38,30 +38,30 @@ GEM
       jekyll (~> 3.3)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    kramdown (2.3.0)
+    kramdown (2.3.1)
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
     liquid (4.0.3)
-    listen (3.2.1)
+    listen (3.5.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
     mini_portile2 (2.5.0)
-    nokogiri (1.11.0.rc4)
+    nokogiri (1.11.2)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     posix-spawn (0.3.15)
-    public_suffix (4.0.5)
+    public_suffix (4.0.6)
     racc (1.5.2)
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     redcarpet (3.5.1)
     rexml (3.2.4)
-    rouge (3.21.0)
+    rouge (3.26.0)
     safe_yaml (1.0.5)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
@@ -77,10 +77,10 @@ DEPENDENCIES
   jekyll-last-modified-at (~> 1.0)
   jekyll-redirect-from (~> 0.13.0)
   jekyll-sitemap (~> 1.2.0)
-  kramdown (~> 2.3.0)
+  kramdown (~> 2.3.1)
   kramdown-parser-gfm (~> 1.1.0)
-  nokogiri (~> 1.11.0.rc4)
+  nokogiri (~> 1.11.1)
   redcarpet (~> 3.5.1)
 
 BUNDLED WITH
-   1.17.3
+   1.17.1

_includes/template/head.html

@@ -43,6 +43,10 @@
         .codepen_tabs {
             margin-bottom: 1em;
         }
+        :focus {
+          box-shadow: inherit;
+          font-weight:inherit;
+        }
     </style>
 
 </head>