diff --git a/Gemfile b/Gemfile
index dc96d93..a78f3c5 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source 'https://rubygems.org'
 
 group :development, :test do
-  gem 'html-proofer', '~> 3.19.2'
+  gem 'html-proofer', '~> 3.19.3'
   gem 'jekyll', '~> 4.2.1'
   gem 'jekyll-feed', '~> 0.15.0'
   gem 'jekyll-paginate', '~> 1.1.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index af6032c..5c42e8e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,26 +5,26 @@ GEM
       public_suffix (>= 2.0.2, < 5.0)
     colorator (1.1.0)
     concurrent-ruby (1.1.9)
-    em-websocket (0.5.2)
+    em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
-      http_parser.rb (~> 0.6.0)
-    ethon (0.14.0)
+      http_parser.rb (~> 0)
+    ethon (0.15.0)
       ffi (>= 1.15.0)
     eventmachine (1.2.7)
     eventmachine (1.2.7-x64-mingw32)
     ffi (1.15.4)
     ffi (1.15.4-x64-mingw32)
     forwardable-extended (2.6.0)
-    html-proofer (3.19.2)
+    html-proofer (3.19.3)
       addressable (~> 2.3)
       mercenary (~> 0.3)
-      nokogumbo (~> 2.0)
+      nokogiri (~> 1.12)
       parallel (~> 1.3)
       rainbow (~> 3.0)
       typhoeus (~> 1.3)
       yell (~> 2.0)
-    http_parser.rb (0.6.0)
-    i18n (1.8.10)
+    http_parser.rb (0.8.0)
+    i18n (1.8.11)
       concurrent-ruby (~> 1.0)
     jekyll (4.2.1)
       addressable (~> 2.4)
@@ -67,19 +67,17 @@ GEM
       racc (~> 1.4)
     nokogiri (1.12.5-x64-mingw32)
       racc (~> 1.4)
-    nokogumbo (2.0.5)
-      nokogiri (~> 1.8, >= 1.8.4)
     parallel (1.21.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (4.0.6)
-    racc (1.5.2)
+    racc (1.6.0)
     rainbow (3.0.0)
     rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rexml (3.2.5)
-    rouge (3.26.1)
+    rouge (3.27.0)
     safe_yaml (1.0.5)
     sassc (2.4.0)
       ffi (~> 1.9)
@@ -98,7 +96,7 @@ PLATFORMS
   x64-mingw32
 
 DEPENDENCIES
-  html-proofer (~> 3.19.2)
+  html-proofer (~> 3.19.3)
   jekyll (~> 4.2.1)
   jekyll-feed (~> 0.15.0)
   jekyll-paginate (~> 1.1.0)
@@ -107,4 +105,4 @@ DEPENDENCIES
   wdm (~> 0.1.1)
 
 BUNDLED WITH
-   2.2.29
+   2.2.33