diff --git a/Gemfile b/Gemfile
index 417a899..227db98 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-gem 'html-proofer', '5.0'
+gem 'html-proofer', '~> 5.0'
 gem 'jekyll', '~> 4.3'
 gem 'kramdown-parser-gfm', '~> 1.1'
 gem 'webrick', '~> 1.7'
diff --git a/Gemfile.lock b/Gemfile.lock
index bdad806..84da645 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,20 +1,24 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (7.0.4.3)
+    Ascii85 (1.1.0)
+    activesupport (7.0.6)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 1.6, < 2)
       minitest (>= 5.1)
       tzinfo (~> 2.0)
-    addressable (2.8.1)
+    addressable (2.8.4)
       public_suffix (>= 2.0.2, < 6.0)
-    async (2.5.0)
+    afm (0.2.2)
+    async (2.6.2)
       console (~> 1.10)
+      fiber-annotation
       io-event (~> 1.1)
       timers (~> 4.1)
     colorator (1.1.0)
     concurrent-ruby (1.2.2)
-    console (1.16.2)
+    console (1.17.2)
+      fiber-annotation
       fiber-local
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
@@ -23,26 +27,29 @@ GEM
       ffi (>= 1.15.0)
     eventmachine (1.2.7)
     ffi (1.15.5)
+    fiber-annotation (0.2.0)
     fiber-local (1.0.0)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
-    google-protobuf (3.22.2-x86_64-darwin)
-    google-protobuf (3.22.2-x86_64-linux)
+    google-protobuf (3.23.4-x86_64-darwin)
+    google-protobuf (3.23.4-x86_64-linux)
+    hashery (2.1.2)
     html-pipeline (2.14.3)
       activesupport (>= 2)
       nokogiri (>= 1.4)
-    html-proofer (5.0.0)
+    html-proofer (5.0.7)
       addressable (~> 2.3)
       async (~> 2.1)
       nokogiri (~> 1.13)
+      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)
+    i18n (1.14.1)
       concurrent-ruby (~> 1.0)
-    io-event (1.1.7)
+    io-event (1.2.2)
     jekyll (4.3.2)
       addressable (~> 2.4)
       colorator (~> 1.0)
@@ -91,29 +98,37 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.4.0)
-    minitest (5.18.0)
-    nokogiri (1.14.3-x86_64-darwin)
+    minitest (5.18.1)
+    nokogiri (1.15.3-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.14.3-x86_64-linux)
+    nokogiri (1.15.3-x86_64-linux)
       racc (~> 1.4)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (5.0.1)
-    racc (1.6.2)
+    pdf-reader (2.11.0)
+      Ascii85 (~> 1.0)
+      afm (~> 0.2.1)
+      hashery (~> 2.0)
+      ruby-rc4
+      ttfunk
+    public_suffix (5.0.3)
+    racc (1.7.1)
     rainbow (3.1.1)
+    rake (13.0.6)
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rexml (3.2.5)
-    rouge (4.1.0)
+    rouge (4.1.2)
+    ruby-rc4 (0.1.5)
     safe_yaml (1.0.5)
-    sass-embedded (1.59.3-x86_64-darwin)
-      google-protobuf (~> 3.21)
-    sass-embedded (1.59.3-x86_64-linux-gnu)
-      google-protobuf (~> 3.21)
+    sass-embedded (1.63.6)
+      google-protobuf (~> 3.23)
+      rake (>= 13.0.0)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     timers (4.3.5)
+    ttfunk (1.7.0)
     typhoeus (1.4.0)
       ethon (>= 0.9.0)
     tzinfo (2.0.6)
@@ -121,14 +136,14 @@ GEM
     unicode-display_width (2.4.2)
     webrick (1.8.1)
     yell (2.2.2)
-    zeitwerk (2.6.7)
+    zeitwerk (2.6.8)
 
 PLATFORMS
   x86_64-darwin-21
   x86_64-linux
 
 DEPENDENCIES
-  html-proofer (= 5.0)
+  html-proofer (~> 5.0)
   jekyll (~> 4.3)
   jekyll-feed (~> 0.15)
   jekyll-glossary_tooltip (~> 1.5)