diff --git a/src/Bundle/ChillDocStoreBundle/Resources/public/vuejs/DocumentSignature/App.vue b/src/Bundle/ChillDocStoreBundle/Resources/public/vuejs/DocumentSignature/App.vue
index e63997bcd..a7c222cce 100644
--- a/src/Bundle/ChillDocStoreBundle/Resources/public/vuejs/DocumentSignature/App.vue
+++ b/src/Bundle/ChillDocStoreBundle/Resources/public/vuejs/DocumentSignature/App.vue
@@ -277,8 +277,8 @@ const signature = window.signature;
 
 console.log(signature);
 
-const mountPdf = async (url: string) => {
-  const loadingTask = pdfjsLib.getDocument(url);
+const mountPdf = async (doc: ArrayBuffer) => {
+  const loadingTask = pdfjsLib.getDocument(doc);
   pdf = await loadingTask.promise;
   pageCount.value = pdf.numPages;
   await setPage(page.value);
@@ -317,7 +317,8 @@ async function downloadAndOpen(): Promise<Blob> {
     console.error("error while downloading and decrypting document", e);
     throw e;
   }
-  await mountPdf(URL.createObjectURL(raw));
+  const doc = await raw.arrayBuffer();
+  await mountPdf(doc);
   return raw;
 }