diff --git a/components/Form.tsx b/components/Form.tsx
index 67bf46c..cecb600 100644
--- a/components/Form.tsx
+++ b/components/Form.tsx
@@ -106,7 +106,7 @@ function Form(): JSX.Element {
     // Add event listener to listen for file change events
     useEffect(() => {
         if (inputFile && inputFile.current) {
-            inputFile.current.addEventListener('input', () => {
+            inputFile.current.addEventListener('change', () => {
                 let selectedFile = inputFile.current.files[0];
                 if (selectedFile !== undefined) {
                     setQrCode(undefined);
diff --git a/src/process.ts b/src/process.ts
index 0191ff1..60af42e 100644
--- a/src/process.ts
+++ b/src/process.ts
@@ -1,5 +1,5 @@
 import {PayloadBody, Receipt} from "./payload";
-import * as PdfJS from 'pdfjs-dist'
+import * as PdfJS from 'pdfjs-dist/legacy/build/pdf'
 import {COLORS} from "./colors";
 import  { getCertificatesInfoFromPDF } from "@ninja-labs/verify-pdf";  // ES6
 import * as Sentry from '@sentry/react';