diff --git a/12/index.html b/12/index.html
index f5003d8..093b9a7 100644
--- a/12/index.html
+++ b/12/index.html
@@ -47,7 +47,7 @@
       <div id="title"></div>
       <div id="authors"></div>
     </div>
-    <div id="resources_05" class=""><iframe name="resources_05" id="iframe" class="resources_iframe" src='resources_05.html'></iframe></div>
+    <div id="resources_05" class=""><iframe name="resources_05" id="iframe" class="resources_iframe hidden" src='resources_05.html'></iframe></div>
     <!--  <div id="info"><div id="title"></div><div id="authors"></div> -->
     <div id="week_05">
       <div class="schedule_05">