diff --git a/src/thsf/templates/planning.html b/src/thsf/templates/planning.html
index 9fa9c5b..aca6a52 100644
--- a/src/thsf/templates/planning.html
+++ b/src/thsf/templates/planning.html
@@ -2,6 +2,7 @@
 {% block content %}
       <div class="content">
         {% for slot in slots %}
+          {% set loop_index = loop.index %}
           {% if filter %}
             {% if slot.submission_type.en | lower in filter %}
               {% include "slot.html" %}
diff --git a/src/thsf/templates/slot.html b/src/thsf/templates/slot.html
index af32619..e3b0e52 100644
--- a/src/thsf/templates/slot.html
+++ b/src/thsf/templates/slot.html
@@ -1,7 +1,7 @@
 <div class="slot">
   <div class="slot_header">
     <div class="slot_title {{ slot.slot.start | date2dayclass}}"
-         onclick="switch_visibility(document.getElementById('{{slot.code}}'))">
+         onclick="switch_visibility(document.getElementById('{{slot.code}}_{{loop_index}}'))">
       <i class="black {{slot.submission_type.fr | toicon }}"></i>
       <span class="title">{{slot.title}}</span>
     </div>
@@ -17,12 +17,12 @@
       <div class="speakers">
         {% for speaker in slot.speakers %}
           <div class="speaker">
-            <div class="name" onclick="switch_visibility(document.getElementById('{{speaker.code}}'))">
+            <div class="name" onclick="switch_visibility(document.getElementById('{{speaker.code}}_{{loop_index}}'))">
               <i class="fa-solid fa-user"></i>
               <span>{{speaker.name | title}}</span>
             </div>
             {% if speaker.avatar or speaker.biography %}
-            <div id="{{speaker.code}}" class="speaker_details">
+            <div id="{{speaker.code}}_{{loop_index}}" class="speaker_details">
               {% if speaker.avatar %}
               <div class="speaker_avatar">
                 <img class="speaker_img"
@@ -43,7 +43,7 @@
           </div>
         {% endfor %}
       </div>
-      <div id="{{slot.code}}" class="slot_details">
+      <div id="{{slot.code}}_{{loop_index}}" class="slot_details">
         <div class="abstract">
           {% if slot.image %}
           <img class="slot_img"