diff --git a/atlas/templates/atlas/case_displaysets.html b/atlas/templates/atlas/case_displaysets.html
index 800e04e6..c12aa629 100755
--- a/atlas/templates/atlas/case_displaysets.html
+++ b/atlas/templates/atlas/case_displaysets.html
@@ -39,7 +39,7 @@
     <script>
         document.addEventListener("DOMContentLoaded", function () {
             // Delay mounting slightly to ensure viewer assets and DOM are ready
-            setTimeout(function() { window.mountDicomViewers(); }, 200);
+            setTimeout(function() { window.mountDicomViewers(); }, 500);
 
 
             {% if selected_displayset %}