diff --git a/Gemfile b/Gemfile
index 5f83cf7f..6f8c2054 100644
--- a/Gemfile
+++ b/Gemfile
@@ -20,6 +20,6 @@ gem "tzinfo-data", platforms: [:mingw, :mswin, :x64_mingw, :jruby]
 # Performance-booster for watching directories on Windows
 gem "wdm", "~> 0.1.0" if Gem.win_platform?
 
-gem "html-proofer", "~> 3.18"
+gem "html-proofer", "~> 5.0"
 
 gem 'jekyll-sass-converter', '~> 3.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index 16be9085..e08ed213 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,34 +1,53 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    Ascii85 (2.0.1)
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
+    afm (0.2.2)
+    async (2.23.1)
+      console (~> 1.29)
+      fiber-annotation
+      io-event (~> 1.9)
+      metrics (~> 0.12)
+      traces (~> 0.15)
     base64 (0.2.0)
     bigdecimal (3.1.8)
     colorator (1.1.0)
     concurrent-ruby (1.3.4)
+    console (1.30.2)
+      fiber-annotation
+      fiber-local (~> 1.1)
+      json
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
     ethon (0.16.0)
       ffi (>= 1.15.0)
     eventmachine (1.2.7)
-    ffi (1.17.0-x86_64-linux-gnu)
+    ffi (1.17.1-x86_64-linux-gnu)
+    fiber-annotation (0.2.0)
+    fiber-local (1.1.0)
+      fiber-storage
+    fiber-storage (1.0.0)
     forwardable-extended (2.6.0)
     google-protobuf (4.29.1-x86_64-linux)
       bigdecimal
       rake (>= 13)
-    html-proofer (3.19.4)
+    hashery (2.1.2)
+    html-proofer (5.0.10)
       addressable (~> 2.3)
-      mercenary (~> 0.3)
+      async (~> 2.1)
       nokogiri (~> 1.13)
-      parallel (~> 1.10)
+      pdf-reader (~> 2.11)
       rainbow (~> 3.0)
       typhoeus (~> 1.3)
       yell (~> 2.0)
+      zeitwerk (~> 2.5)
     http_parser.rb (0.8.0)
     i18n (1.14.6)
       concurrent-ruby (~> 1.0)
+    io-event (1.10.0)
     jekyll (4.3.3)
       addressable (~> 2.4)
       colorator (~> 1.0)
@@ -58,6 +77,7 @@ GEM
       jekyll (>= 3.7, < 5.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
+    json (2.10.2)
     kramdown (2.5.1)
       rexml (>= 3.3.9)
     kramdown-parser-gfm (1.1.0)
@@ -67,11 +87,17 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.4.0)
-    nokogiri (1.18.4-x86_64-linux-gnu)
+    metrics (0.12.2)
+    nokogiri (1.18.7-x86_64-linux-gnu)
       racc (~> 1.4)
-    parallel (1.26.3)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
+    pdf-reader (2.14.1)
+      Ascii85 (>= 1.0, < 3.0, != 2.0.0)
+      afm (~> 0.2.1)
+      hashery (~> 2.0)
+      ruby-rc4
+      ttfunk
     public_suffix (6.0.1)
     racc (1.8.1)
     rack (2.2.13)
@@ -83,6 +109,7 @@ GEM
     redcarpet (3.6.0)
     rexml (3.3.9)
     rouge (4.5.1)
+    ruby-rc4 (0.1.5)
     safe_yaml (1.0.5)
     sass-embedded (1.82.0)
       google-protobuf (~> 4.28)
@@ -93,17 +120,21 @@ GEM
       rack (> 1, < 3)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
+    traces (0.15.2)
+    ttfunk (1.8.0)
+      bigdecimal (~> 3.1)
     typhoeus (1.4.1)
       ethon (>= 0.9.0)
     unicode-display_width (2.6.0)
     webrick (1.9.1)
     yell (2.2.2)
+    zeitwerk (2.7.2)
 
 PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
-  html-proofer (~> 3.18)
+  html-proofer (~> 5.0)
   jekyll (= 4.3.3)
   jekyll-liquify (= 0.0.2)
   jekyll-paginate-v2 (= 3.0.0)