diff --git a/src/program/templates/schedule_overview.html b/src/program/templates/schedule_overview.html
index 33d0e3a4..1742ef78 100644
--- a/src/program/templates/schedule_overview.html
+++ b/src/program/templates/schedule_overview.html
@@ -36,7 +36,7 @@ var elm_app = Elm.Main.embed(
     , 'schedule_midnight_offset_hours': Number('{{ schedule_midnight_offset_hours }}')
     , 'ics_button_href': "{% url 'program:ics_view' camp_slug=camp.slug %}"
     , 'camp_slug': "{{ camp.slug }}"
-    , 'websocket_server': "ws://" + window.location.host + "/schedule/"
+    , 'websocket_server': "wss://" + window.location.host + "/schedule/"
     }
 );
 </script>