diff --git a/templates/edu_absences.twig b/templates/edu_absences.twig
index 2307006..2fe69dc 100644
--- a/templates/edu_absences.twig
+++ b/templates/edu_absences.twig
@@ -1,6 +1,6 @@
 {% if groups|default %}
 <div id="accordion" class="panel-group" role="tablist" aria-multiselectable="true">
-{% for identifier, group in groups %}
+{% for identifier, group in groups|sort %}
   <div class="panel panel-default">
     <button id="head_{{ identifier }}" class="panel-heading collapsed" data-parent="#accordion" data-target="#{{ identifier }}" data-toggle="collapse" aria-expanded="false">
       <h4 class="panel-title">{{ group['nom'] }}</h4>