diff --git a/docs/index.html b/docs/index.html
index ac8878af..6b60466b 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -284,7 +284,7 @@
     <ul class="text-start">
       <li>supported formats:
         <ul>
-          <li>images: <strong>jpg, jpeg, jpe, webp, png, gif, svg</strong></li>
+          <li>images: <strong>jpg, jpeg, jpe, webp, png, gif, svg, dng*, arw*, heic* (depends on the <a href="https://sharp.pixelplumbing.com/install/#custom-libvips">docker container's vips build</a>)</strong></li>
           <li>videos: <strong>mp4, ogg, ogv, webm</strong></li>
         </ul>
       </li>