diff --git a/app/assets/javascripts/fullcalendar.js b/app/assets/javascripts/fullcalendar.js.erb
similarity index 87%
rename from app/assets/javascripts/fullcalendar.js
rename to app/assets/javascripts/fullcalendar.js.erb
index 3a0d88ac..992bcbc6 100644
--- a/app/assets/javascripts/fullcalendar.js
+++ b/app/assets/javascripts/fullcalendar.js.erb
@@ -3,8 +3,10 @@ $( document ).ready(function() {
     if (!calendarEl) return; //check that we need a vertical schedule
     let fullcalData = $('#fullcalendar');
 
+    let license_key = "<%= Rails.configuration.fullcalendar[:license_key] %>";
+
     var calendar = new FullCalendar.Calendar(calendarEl, {
-      schedulerLicenseKey: fullcalData.data('schedulerLicenseKey'),
+      schedulerLicenseKey: license_key,
       nowIndicator: true,
       now: fullcalData.data('now'),
       expandRows: true,
@@ -24,3 +26,5 @@ $( document ).ready(function() {
 
     calendar.render();
 });
+
+
diff --git a/app/views/schedules/vertical_schedule.haml b/app/views/schedules/vertical_schedule.haml
index 6e8be368..9e5ce379 100644
--- a/app/views/schedules/vertical_schedule.haml
+++ b/app/views/schedules/vertical_schedule.haml
@@ -9,5 +9,4 @@
   #fullcalendar{ data: { rooms: @rooms, events: @event_schedules, day: @day,
   'start-hour': @conference.start_hour, 'end-hour': @conference.end_hour,
   'start-date': @conference.start_date, 'end-date': @conference.end_date + 1.day,
-  'timezone': @conference.timezone, 'now': @now,
-  'scheduler-license-key': @scheduler_license_key } }
+  'timezone': @conference.timezone, 'now': @now } }