diff --git a/addons/website_sale_delivery/static/src/js/website_sale_delivery.js b/addons/website_sale_delivery/static/src/js/website_sale_delivery.js
index 79c70becf98..1907df94574 100644
--- a/addons/website_sale_delivery/static/src/js/website_sale_delivery.js
+++ b/addons/website_sale_delivery/static/src/js/website_sale_delivery.js
@@ -5,6 +5,8 @@ odoo.define('website_sale_delivery.checkout', function (require) {
     var ajax = require('web.ajax');
     var core = require('web.core');
     var _t = core._t;
+    var concurrency = require('web.concurrency');
+    var dp = new concurrency.DropPrevious();
 
     /* Handle interactive carrier choice + cart update */
     var $pay_button = $('#o_payment_form_pay');
@@ -51,7 +53,7 @@ odoo.define('website_sale_delivery.checkout', function (require) {
         $pay_button.prop('disabled', true);
         var carrier_id = $(ev.currentTarget).val();
         var values = {'carrier_id': carrier_id};
-        ajax.jsonRpc('/shop/update_carrier', 'call', values)
+        dp.add(ajax.jsonRpc('/shop/update_carrier', 'call', values))
           .then(_onCarrierUpdateAnswer);
     };