diff --git a/Gemfile b/Gemfile
index d104a6e..2b7ee18 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@ source "https://rubygems.org"
 
 gem "jekyll", "~> 4.2.2"
 gem "minima", "~> 2.5"
-gem "html-proofer", "~> 3.19"
+gem "html-proofer", "~> 5.0"
 
 # If you have any plugins, put them here
 group :jekyll_plugins do
diff --git a/Gemfile.lock b/Gemfile.lock
index 74abd57..0edf0a9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,29 +1,48 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    addressable (2.8.1)
+    Ascii85 (1.1.1)
+    addressable (2.8.6)
       public_suffix (>= 2.0.2, < 6.0)
+    afm (0.2.2)
+    async (2.11.0)
+      console (~> 1.25, >= 1.25.2)
+      fiber-annotation
+      io-event (~> 1.5, >= 1.5.1)
+      timers (~> 4.1)
+    bigdecimal (3.1.8)
     colorator (1.1.0)
     concurrent-ruby (1.1.10)
+    console (1.25.2)
+      fiber-annotation
+      fiber-local (~> 1.1)
+      json
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
-    ethon (0.15.0)
+    ethon (0.16.0)
       ffi (>= 1.15.0)
     eventmachine (1.2.7)
-    ffi (1.15.5)
+    ffi (1.16.3)
+    fiber-annotation (0.2.0)
+    fiber-local (1.1.0)
+      fiber-storage
+    fiber-storage (0.1.1)
     forwardable-extended (2.6.0)
-    html-proofer (3.19.4)
+    hashery (2.1.2)
+    html-proofer (5.0.9)
       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 (1.12.0)
       concurrent-ruby (~> 1.0)
+    io-event (1.5.1)
     jekyll (4.2.2)
       addressable (~> 2.4)
       colorator (~> 1.0)
@@ -49,6 +68,7 @@ GEM
       jekyll (>= 3.7, < 5.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
+    json (2.7.2)
     kramdown (2.4.0)
       rexml
     kramdown-parser-gfm (1.1.0)
@@ -58,7 +78,7 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.4.0)
-    mini_portile2 (2.8.6)
+    mini_portile2 (2.8.7)
     minima (2.5.1)
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
@@ -66,11 +86,16 @@ GEM
     nokogiri (1.16.5)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    parallel (1.22.1)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (5.0.0)
-    racc (1.7.3)
+    pdf-reader (2.12.0)
+      Ascii85 (~> 1.0)
+      afm (~> 0.2.1)
+      hashery (~> 2.0)
+      ruby-rc4
+      ttfunk
+    public_suffix (5.0.5)
+    racc (1.8.0)
     rainbow (3.1.1)
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
@@ -78,22 +103,27 @@ GEM
     rexml (3.2.8)
       strscan (>= 3.0.9)
     rouge (3.30.0)
+    ruby-rc4 (0.1.5)
     safe_yaml (1.0.5)
     sassc (2.4.0)
       ffi (~> 1.9)
     strscan (3.1.0)
     terminal-table (2.0.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
-    typhoeus (1.4.0)
+    timers (4.3.5)
+    ttfunk (1.8.0)
+      bigdecimal (~> 3.1)
+    typhoeus (1.4.1)
       ethon (>= 0.9.0)
     unicode-display_width (1.8.0)
     yell (2.2.2)
+    zeitwerk (2.6.15)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  html-proofer (~> 3.19)
+  html-proofer (~> 5.0)
   jekyll (~> 4.2.2)
   jekyll-feed (~> 0.17)
   jekyll-sitemap (~> 1.4)