diff --git a/lib/exceljs.browser.js b/lib/exceljs.browser.js
index 80f76c082..d7558203a 100644
--- a/lib/exceljs.browser.js
+++ b/lib/exceljs.browser.js
@@ -1,5 +1,6 @@
 /* eslint-disable import/no-extraneous-dependencies,node/no-unpublished-require */
 require('core-js/modules/es.promise');
+require('core-js/modules/es.promise.finally');
 require('core-js/modules/es.object.assign');
 require('core-js/modules/es.object.keys');
 require('core-js/modules/es.object.values');