diff --git a/services/web/babel.config.json b/services/web/babel.config.json
index ed94b409a9..74962dd258 100644
--- a/services/web/babel.config.json
+++ b/services/web/babel.config.json
@@ -32,7 +32,8 @@
           {
             "targets": { "node": "12.21" },
             "useBuiltIns": "usage",
-            "corejs": { "version": 3 }
+            // This version must be aligned with the `core-js` version in `package.json`
+            "corejs": { "version": 3.6 }
           }
         ]
       ]
diff --git a/services/web/frontend/js/features/pdf-preview/util/pdf-js-wrapper.js b/services/web/frontend/js/features/pdf-preview/util/pdf-js-wrapper.js
index a387d424f7..ef52f13fa5 100644
--- a/services/web/frontend/js/features/pdf-preview/util/pdf-js-wrapper.js
+++ b/services/web/frontend/js/features/pdf-preview/util/pdf-js-wrapper.js
@@ -11,6 +11,11 @@ if (typeof window !== 'undefined' && 'Worker' in window) {
   PDFJS.GlobalWorkerOptions.workerPort = new PDFJSWorker()
 }
 
+// forces the method (required by pdf.js) to be polyfilled by webpack, since
+// processing pdf.js by webpack/babel causes issues loading documents
+// eslint-disable-next-line no-unused-expressions
+Promise.allSettled
+
 const params = new URLSearchParams(window.location.search)
 const disableFontFace = params.get('disable-font-face') === 'true'
 const cMapUrl = getMeta('ol-pdfCMapsPath')