diff --git a/docs/upgrade.html b/docs/upgrade.html
index c0c03f728e624..51b1c041176c9 100644
--- a/docs/upgrade.html
+++ b/docs/upgrade.html
@@ -39,6 +39,10 @@ <h5><a id="upgrade_400_notable" href="#upgrade_400_notable">Notable changes in 4
                         <li>The <code>delegation.token.master.key</code> configuration was removed.
                             Please use <code>delegation.token.secret.key</code> instead.
                         </li>
+                        <li>
+                            The <code>offsets.commit.required.acks</code> configuration was removed.
+                            See <a href="https://cwiki.apache.org/confluence/x/9YobEg">KIP-1041</a> for details.
+                        </li>
                     </ul>
                 </li>
                 <li><b>MirrorMaker</b>