diff --git a/core/constants.js b/core/constants.js
index 00719075..73c10cf9 100644
--- a/core/constants.js
+++ b/core/constants.js
@@ -268,6 +268,7 @@ const CDNs = {
     'js.appboycdn.com': 'Appboy CDN',
     'cdn.embed.ly': 'embedly',
     'cdn.datatables.net': 'DataTables',
+    'mathjax.rstudio.com': 'MathJax RStudio',
 };
 
 const IgnoredHost = {
diff --git a/core/mappings.js b/core/mappings.js
index 3a569621..fbc62806 100644
--- a/core/mappings.js
+++ b/core/mappings.js
@@ -30,7 +30,7 @@ var mappings = {};
  * This only needs to be updated when new domains are added.
  * It's not necessary for subdirectories!
  */
-mappings.lastMappingUpdate = '2021-05-02';
+mappings.lastMappingUpdate = '2021-05-25';
 
 mappings.cdn = {
 
@@ -1030,6 +1030,11 @@ mappings.cdn = {
         '/': {
             '{version}/': resources.datatables
         }
+    },
+    'mathjax.rstudio.com': {
+        '/': {
+            '{version}': resources.mathJax,
+        }
     }
 };
 
diff --git a/pages/updates/updates.html b/pages/updates/updates.html
index 875996bc..f7811592 100644
--- a/pages/updates/updates.html
+++ b/pages/updates/updates.html
@@ -29,6 +29,7 @@
                         <li>Updated: Chart.js v3.2.1 -> v3.3.0 (<a href="https://codeberg.org/nobody/LocalCDN/issues/471">#471</a>)</li>
                         <li>Updated: appboy-web-sdk v3.2.0 -> v3.3.0 (<a href="https://codeberg.org/nobody/LocalCDN/issues/472">#472</a>)</li>
                         <li>Added: MathJax (minimal) v2.7.5 (<a href="https://codeberg.org/nobody/LocalCDN/issues/75">#75</a>)</li>
+                        <li>Mapping: MathJax -> mathjax.rstudio.com (<a href="https://codeberg.org/nobody/LocalCDN/issues/469">#469</a>)</li>
                     </ul>
                     <div id="generator-section">
                         <div class="topic-label">