diff --git a/cookbook/static/pdfjs/web/viewer.mjs b/cookbook/static/pdfjs/web/viewer.mjs
index 3d1cab6a4..13beee086 100644
--- a/cookbook/static/pdfjs/web/viewer.mjs
+++ b/cookbook/static/pdfjs/web/viewer.mjs
@@ -915,7 +915,7 @@ const defaultOptions = {
     kind: OptionKind.WORKER
   },
   workerSrc: {
-    value: "../build/pdf.worker.mjs",
+    value: "pdf.worker.mjs",
     kind: OptionKind.WORKER
   }
 };
@@ -925,7 +925,7 @@ const defaultOptions = {
     kind: OptionKind.VIEWER
   };
   defaultOptions.sandboxBundleSrc = {
-    value: "../build/pdf.sandbox.mjs",
+    value: "pdf.sandbox.mjs",
     kind: OptionKind.VIEWER
   };
   defaultOptions.enableFakeMLManager = {