diff --git a/Gemfile b/Gemfile
index f3a5b7d6..7365d433 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,4 +9,4 @@ gem 'wdm', '>= 0.1.1' if Gem.win_platform?
 
 gem "webrick", "~> 1.7"
 
-gem 'html-proofer', "~> 3.19.4"
+gem 'html-proofer', "~> 4.3.1"
diff --git a/Gemfile.lock b/Gemfile.lock
index 991347ee..eb0e7ea2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -88,7 +88,7 @@ GEM
     html-pipeline (2.14.2)
       activesupport (>= 2)
       nokogiri (>= 1.4)
-    html-proofer (3.19.4)
+    html-proofer (4.3.1)
       addressable (~> 2.3)
       mercenary (~> 0.3)
       nokogiri (~> 1.13)
@@ -96,6 +96,7 @@ GEM
       rainbow (~> 3.0)
       typhoeus (~> 1.3)
       yell (~> 2.0)
+      zeitwerk (~> 2.5)
     http_parser.rb (0.8.0)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
@@ -222,10 +223,10 @@ GEM
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
     minitest (5.16.2)
-    nokogiri (1.13.7)
+    nokogiri (1.13.8)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
-    nokogiri (1.13.7-x64-mingw32)
+    nokogiri (1.13.8-x64-mingw32)
       racc (~> 1.4)
     octokit (4.25.1)
       faraday (>= 1, < 3)
@@ -276,7 +277,7 @@ PLATFORMS
 
 DEPENDENCIES
   github-pages (= 227)
-  html-proofer (~> 3.19.4)
+  html-proofer (~> 4.3.1)
   webrick (~> 1.7)
 
 BUNDLED WITH