diff --git a/content/audio_download.js b/content/audio_download.js
index 59feb77..c6ad20a 100644
--- a/content/audio_download.js
+++ b/content/audio_download.js
@@ -18,7 +18,7 @@ recorder.onstop = function(e){
 recorder.start(1000);
 
 function saveBlobData(data){
-    const blob = new Blob(data, {
+    const blob = new Blob([data], {
         type: mimeType
     });
     const url = URL.createObjectURL(blob);