diff --git a/Gemfile b/Gemfile
index 051bc4aa6..cfadd3151 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ gem 'bundler', '>= 1.12.0'
 
 gem 'rails', '6.1.4.4'
 gem 'globalid', '~> 0.4.2' if Gem.ruby_version < Gem::Version.new('2.6.0')
-gem 'rouge', '~> 3.27.0'
+gem 'rouge', '~> 3.28.0'
 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 266b76ac0..144a2e2fc 100644
--- a/public/help/code_highlighting_languages.html
+++ b/public/help/code_highlighting_languages.html
@@ -176,7 +176,7 @@
     </tr>
     <tr>
       <td>dart</td>
-      <td>The Dart programming language (dartlang.com)</td>
+      <td>The Dart programming language (dart.dev)</td>
     </tr>
     <tr>
       <td>datastudio</td>
@@ -242,6 +242,10 @@
       <td>factor</td>
       <td>Factor, the practical stack language (factorcode.org)</td>
     </tr>
+    <tr>
+      <td>fluent</td>
+      <td>Fluent localization files [aliases: ftl]</td>
+    </tr>
     <tr>
       <td>fortran</td>
       <td>Fortran 2008 (free-form)</td>
@@ -718,6 +722,14 @@
       <td>ssh</td>
       <td>A lexer for SSH configuration files</td>
     </tr>
+    <tr>
+      <td>stan</td>
+      <td>Stan Modeling Language (mc-stan.org)</td>
+    </tr>
+    <tr>
+      <td>stata</td>
+      <td>The Stata programming language (www.stata.com)</td>
+    </tr>
     <tr>
       <td>supercollider</td>
       <td>A cross-platform interpreted programming language for sound synthesis, algorithmic composition, and realtime performance</td>