diff --git a/addons/website_event/static/src/js/website_event.editor.js b/addons/website_event/static/src/js/website_event.editor.js
index 90b1c07451d..48f3a995d08 100644
--- a/addons/website_event/static/src/js/website_event.editor.js
+++ b/addons/website_event/static/src/js/website_event.editor.js
@@ -21,7 +21,7 @@ WebsiteNewMenu.include({
      * and redirects the user to this new event.
      *
      * @private
-     * @returns {Deferred} Unresolved if there is a redirection
+     * @returns {Promise} Unresolved if there is a redirection
      */
     _createNewEvent: function () {
         var self = this;
@@ -29,7 +29,8 @@ WebsiteNewMenu.include({
             id: "editor_new_event",
             window_title: _t("New Event"),
             input: _t("Event Name"),
-        }).then(function (eventName) {
+        }).then(function (result) {
+            var eventName = result.val;
             if (!eventName) {
                 return;
             }
@@ -40,7 +41,7 @@ WebsiteNewMenu.include({
                 },
             }).then(function (url) {
                 window.location.href = url;
-                return $.Deferred();
+                return new Promise(function () {});
             });
         });
     },
diff --git a/addons/website_event/static/src/js/website_event.js b/addons/website_event/static/src/js/website_event.js
index 4c7d910ee5d..39bc211abc7 100644
--- a/addons/website_event/static/src/js/website_event.js
+++ b/addons/website_event/static/src/js/website_event.js
@@ -36,7 +36,7 @@ var EventRegistrationForm = Widget.extend({
             $('<div class="alert alert-info"/>')
                 .text(_t('Please select at least one ticket.'))
                 .insertAfter('#registration_form table');
-            return $.Deferred();
+            return new Promise(function () {});
         } else {
             $button.attr('disabled', true);
             return ajax.jsonRpc($form.attr('action'), 'call', post).then(function (modal) {
@@ -65,7 +65,7 @@ publicWidget.registry.EventRegistrationFormInstance = publicWidget.Widget.extend
     start: function () {
         var def = this._super.apply(this, arguments);
         var instance = new EventRegistrationForm(this);
-        return $.when(def, instance.appendTo(this.$el));
+        return Promise.all([def, instance.appendTo(this.$el)]);
     },
 });
 
diff --git a/addons/website_event/static/src/js/website_geolocation.js b/addons/website_event/static/src/js/website_geolocation.js
index 6de88dd32a2..19ee2f87033 100644
--- a/addons/website_event/static/src/js/website_geolocation.js
+++ b/addons/website_event/static/src/js/website_geolocation.js
@@ -17,7 +17,7 @@ publicWidget.registry.visitor = publicWidget.Widget.extend({
                 self.$('.country_events_list').replaceWith(data);
             }
         }));
-        return $.when.apply($, defs);
+        return Promise.all(defs);
     },
 });
 });