diff --git a/package-lock.json b/package-lock.json
index f26790c..7890d28 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,18 +1,19 @@
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diff --git a/package.json b/package.json
index 1d513d3..865dc05 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "openreader-webui",
-  "version": "0.2.4-patch.3",
+  "version": "0.2.4-patch.4",
   "private": true,
   "scripts": {
     "dev": "next dev --turbopack -p 3003",
@@ -14,6 +14,7 @@
     "@types/string-similarity": "^4.0.2",
     "@types/uuid": "^10.0.0",
     "compromise": "^14.14.4",
+    "core-js": "^3.41.0",
     "howler": "^2.2.4",
     "lru-cache": "^11.0.2",
     "next": "15.2.1",
diff --git a/src/utils/pdf.ts b/src/utils/pdf.ts
index bbbc973..4521da1 100644
--- a/src/utils/pdf.ts
+++ b/src/utils/pdf.ts
@@ -3,6 +3,7 @@ import nlp from 'compromise';
 import stringSimilarity from 'string-similarity';
 import type { TextItem } from 'pdfjs-dist/types/src/display/api';
 import type { PDFDocumentProxy } from 'pdfjs-dist';
+import "core-js/proposals/promise-with-resolvers";
 
 // Function to detect if we need to use legacy build
 function shouldUseLegacyBuild() {