diff --git a/index.html b/index.html
index bd161d16c..e76d1c507 100644
--- a/index.html
+++ b/index.html
@@ -2703,6 +2703,25 @@ <h2 id="notes">Notes</h2>
 
       <h2 id="changelog">Change Log</h2>
 
+      <p id="1.13.0">
+        <b class="header">1.13.0</b> &mdash; <small><i>April 9, 2021</i></small> &mdash; <a href="https://github.com/jashkenas/underscore/compare/1.13.0-3...1.13.0">Diff</a> &mdash; <a href="https://cdn.rawgit.com/jashkenas/underscore/1.13.0/index.html">Docs</a><br />
+        <ul>
+          <li>
+            Merges the changes from the 1.13.0-0 through 1.13.0-3 preview
+            releases into the main release stream following version 1.12.1. As
+            of this release, ESM support is 100%.
+          </li>
+          <li>
+            Adds a <a
+              href="https://github.com/jashkenas/underscore/security/policy"
+            >security policy</a> to the documentation.
+          </li>
+          <li>
+            Adds funding information to the documentation.
+          </li>
+        </ul>
+      </p>
+
       <p id="1.13.0-3">
         <b class="header">1.13.0-3</b> &mdash; <small><i>March 31, 2021</i></small> &mdash; <a href="https://github.com/jashkenas/underscore/compare/1.13.0-2...1.13.0-3">Diff</a> &mdash; <a href="https://cdn.rawgit.com/jashkenas/underscore/1.13.0-3/index.html">Docs</a><br />
         <ul>