diff --git a/public/index.html b/public/index.html
index e43adc9..0054625 100644
--- a/public/index.html
+++ b/public/index.html
@@ -79,6 +79,7 @@
                     <h5 class="display-5">DNS over HTTPS</h5>
                     <p>DNS over HTTPS is supported by most browsers. To add HNSDoH to your resolvers add this URL to your Secure DNS setting<br><code style="display: block;">https://hnsdoh.com/dns-query</code></p>
                     <p>You can also specify a specific region to have faster resolution with a lower number of servers for redundancy.<br><code style="display: block;">https://{region}.hnsdoh.com/dns-query</code><span>For example the AU region can be set using:&nbsp;</span><code style="display: inline;">https://au.hnsdoh.com/dns-query</code></p>
+                    <p>Note that HNSDoH only supports <a href="https://developers.cloudflare.com/1.1.1.1/encryption/dns-over-https/make-api-requests/dns-wireformat/" target="_blank">DNS wire format</a> and not JSON</p>
                 </div>
             </li>
             <li class="list-group-item">
@@ -429,4 +430,4 @@ document.getElementById('refresh-ping').addEventListener('click', function (even
     <script src="assets/js/bs-init.js"></script>
 </body>
 
-</html>
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+</html>