diff --git a/www/index.html b/www/index.html
index c114534..a6dda29 100644
--- a/www/index.html
+++ b/www/index.html
@@ -237,6 +237,7 @@ <h3><code>prefetch-src</code></h3>
         <h5>Example prefetch-src Policy</h5>
         <pre>prefetch-src 'none'</pre>
         <span class="label label-success">CSP Level 3</span>
+        <span class="label label-default"><i class="fa fa-safari"></i> 16.3+</span>
       </div>
 
       <h3><code>navigate-to</code></h3>