diff --git a/apps/OpenSign/src/App.js b/apps/OpenSign/src/App.js
index 83e5c51cf..7e8048b88 100644
--- a/apps/OpenSign/src/App.js
+++ b/apps/OpenSign/src/App.js
@@ -31,7 +31,21 @@ const ManageSign = lazy(() => import("./pages/Managesign"));
 const GenerateToken = lazy(() => import("./pages/GenerateToken"));
 const Webhook = lazy(() => import("./pages/Webhook"));
 
-pdfjs.GlobalWorkerOptions.workerSrc = `//cdnjs.cloudflare.com/ajax/libs/pdf.js/${pdfjs.version}/pdf.worker.min.mjs`;
+const path = new URL(
+  "pdfjs-dist/legacy/build/pdf.worker.min.mjs",
+  import.meta.url
+).toString();
+fetch(path)
+  .then((fetchResponse) => {
+    return fetchResponse.text();
+  })
+  .then((code) => {
+    const codeBlob = new Blob([code], { type: "text/javascript" });
+    const workerURL = URL.createObjectURL(codeBlob);
+    pdfjs.GlobalWorkerOptions.workerSrc = workerURL;
+  })
+  .catch((err) => console.log("err in load pdf worker", err));
+
 const AppLoader = () => {
   return (
     <div className="flex justify-center items-center h-[100vh]">