diff --git a/Gemfile b/Gemfile
index fb018ed4e..405797510 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,7 +3,7 @@ source 'https://rubygems.org'
 ruby '>= 2.7.0', '< 3.3.0'
 
 gem 'rails', '6.1.7.6'
-gem 'rouge', '~> 4.1.0'
+gem 'rouge', '~> 4.2.0'
 gem 'request_store', '~> 1.5.0'
 gem 'mini_mime', '~> 1.1.0'
 gem "actionpack-xml_parser"
diff --git a/public/help/code_highlighting_languages.html b/public/help/code_highlighting_languages.html
index 4f3fe1b2d..a98a9829c 100644
--- a/public/help/code_highlighting_languages.html
+++ b/public/help/code_highlighting_languages.html
@@ -118,6 +118,10 @@
       <td>cmhg</td>
       <td>RISC OS C module header generator source file</td>
     </tr>
+    <tr>
+      <td>codeowners</td>
+      <td>Code Owners syntax (https://docs.gitlab.com/ee/user/project/codeowners/reference.html)</td>
+    </tr>
     <tr>
       <td>coffeescript</td>
       <td>The Coffeescript programming language (coffeescript.org) [aliases: coffee,coffee-script]</td>
@@ -200,7 +204,7 @@
     </tr>
     <tr>
       <td>dot</td>
-      <td>graph description language</td>
+      <td>graph description language [aliases: graphviz]</td>
     </tr>
     <tr>
       <td>ecl</td>
@@ -568,7 +572,7 @@
     </tr>
     <tr>
       <td>openedge</td>
-      <td>The OpenEdge ABL programming language</td>
+      <td>The OpenEdge ABL programming language [aliases: abl]</td>
     </tr>
     <tr>
       <td>opentype_feature_file</td>
@@ -762,6 +766,10 @@
       <td>supercollider</td>
       <td>A cross-platform interpreted programming language for sound synthesis, algorithmic composition, and realtime performance</td>
     </tr>
+    <tr>
+      <td>svelte</td>
+      <td>Svelte single-file components (https://svelte.dev/)</td>
+    </tr>
     <tr>
       <td>swift</td>
       <td>Multi paradigm, compiled programming language developed by Apple for iOS and OS X development. (developer.apple.com/swift)</td>
@@ -820,7 +828,7 @@
     </tr>
     <tr>
       <td>typescript</td>
-      <td>TypeScript, a superset of JavaScript [aliases: ts]</td>
+      <td>TypeScript, a superset of JavaScript (https://www.typescriptlang.org/) [aliases: ts]</td>
     </tr>
     <tr>
       <td>vala</td>