diff --git a/Gemfile b/Gemfile
index 1ab2b4e..e6c1539 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,3 +2,4 @@ source 'https://rubygems.org'
 
 gemspec
 gem 'html-proofer'
+gem 'kramdown-parser-gfm'
\ No newline at end of file
diff --git a/Gemfile.lock b/Gemfile.lock
index 3e46a09..6f5f8e6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,44 +7,37 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.2.4.3)
-      concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
-    addressable (2.5.2)
-      public_suffix (>= 2.0.2, < 4.0)
+    addressable (2.7.0)
+      public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
-    colorize (0.8.1)
-    concurrent-ruby (1.0.5)
-    em-websocket (0.5.1)
+    concurrent-ruby (1.1.7)
+    em-websocket (0.5.2)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
-    ethon (0.11.0)
+    ethon (0.12.0)
       ffi (>= 1.3.0)
     eventmachine (1.2.7)
-    ffi (1.9.25)
+    ffi (1.14.2)
     forwardable-extended (2.6.0)
-    html-proofer (3.8.0)
-      activesupport (>= 4.2, < 6.0)
+    html-proofer (3.18.5)
       addressable (~> 2.3)
-      colorize (~> 0.8)
-      mercenary (~> 0.3.2)
-      nokogiri (~> 1.10.8)
+      mercenary (~> 0.3)
+      nokogumbo (~> 2.0)
       parallel (~> 1.3)
+      rainbow (~> 3.0)
       typhoeus (~> 1.3)
       yell (~> 2.0)
     http_parser.rb (0.6.0)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    jekyll (3.8.4)
+    jekyll (3.9.0)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
       i18n (~> 0.7)
       jekyll-sass-converter (~> 1.0)
       jekyll-watch (~> 2.0)
-      kramdown (~> 1.14)
+      kramdown (>= 1.17, < 3)
       liquid (~> 4.0)
       mercenary (~> 0.3.3)
       pathutil (~> 0.9)
@@ -52,40 +45,43 @@ GEM
       safe_yaml (~> 1.0)
     jekyll-sass-converter (1.5.2)
       sass (~> 3.4)
-    jekyll-watch (2.1.1)
+    jekyll-watch (2.2.1)
       listen (~> 3.0)
-    kramdown (1.17.0)
-    liquid (4.0.1)
-    listen (3.1.5)
-      rb-fsevent (~> 0.9, >= 0.9.4)
-      rb-inotify (~> 0.9, >= 0.9.7)
-      ruby_dep (~> 1.2)
+    kramdown (2.3.0)
+      rexml
+    kramdown-parser-gfm (1.1.0)
+      kramdown (~> 2.0)
+    liquid (4.0.3)
+    listen (3.4.0)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
-    mini_portile2 (2.3.0)
-    minitest (5.11.3)
-    nokogiri (1.10.8)
-      mini_portile2 (~> 2.4.0)
-    parallel (1.12.1)
-    pathutil (0.16.1)
+    mini_portile2 (2.5.0)
+    nokogiri (1.11.1)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
+    nokogumbo (2.0.4)
+      nokogiri (~> 1.8, >= 1.8.4)
+    parallel (1.20.1)
+    pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.3)
-    rb-fsevent (0.10.3)
-    rb-inotify (0.9.10)
-      ffi (>= 0.5.0, < 2)
-    rouge (3.3.0)
-    ruby_dep (1.5.0)
-    safe_yaml (1.0.4)
-    sass (3.6.0)
+    public_suffix (4.0.6)
+    racc (1.5.2)
+    rainbow (3.0.0)
+    rb-fsevent (0.10.4)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
+    rexml (3.2.4)
+    rouge (3.26.0)
+    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)
-    thread_safe (0.3.6)
-    typhoeus (1.3.0)
+    typhoeus (1.4.0)
       ethon (>= 0.9.0)
-    tzinfo (1.2.5)
-      thread_safe (~> 0.1)
-    yell (2.0.7)
+    yell (2.2.2)
 
 PLATFORMS
   ruby
@@ -93,4 +89,7 @@ PLATFORMS
 DEPENDENCIES
   html-proofer
   jekyll-theme-minimal!
+  kramdown-parser-gfm
 
+BUNDLED WITH
+   2.0.2