diff --git a/package.json b/package.json
index a438374..d9fc697 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
     "marked": "^17.0.3",
     "marked-highlight": "^2.2.3",
     "pdf-lib": "^1.17.1",
-    "pdfjs-dist": "^3.11.174",
+    "pdfjs-dist": "^5.5.207",
     "pdfkit": "^0.14.0",
     "pizzip": "^3.2.0",
     "tslib": "^2.8.1",
diff --git a/src/renderer.js b/src/renderer.js
index 0ef4568..37b5bbc 100644
--- a/src/renderer.js
+++ b/src/renderer.js
@@ -4182,7 +4182,7 @@ let isPdfViewerActive = false; // Track if PDF viewer is currently shown
 
 // Initialize PDF.js
 const pdfjsLib = require('pdfjs-dist');
-pdfjsLib.GlobalWorkerOptions.workerSrc = require.resolve('pdfjs-dist/build/pdf.worker.js');
+pdfjsLib.GlobalWorkerOptions.workerSrc = require.resolve('pdfjs-dist/build/pdf.worker.mjs');
 
 // Open PDF file
 async function openPdfFile(filePath) {