diff --git a/index.html b/index.html
index 1ea1085..ad619af 100644
--- a/index.html
+++ b/index.html
@@ -4538,6 +4538,9 @@ <h2>Revision History</h2>
         <li>
 Ensure that base URL is set to null when processing as RDF.
         </li>
+        <li>
+Updated requirements for `proof` objects.
+        </li>
       </ul>
     </section>
     <section class="appendix informative">