diff --git a/backup.js b/backup.js
index a0855cdf3..b0159036d 100644
--- a/backup.js
+++ b/backup.js
@@ -45,7 +45,7 @@ function bangleDownload() {
   }).then(() => {
     return Comms.showMessage(Const.MESSAGE_RELOAD);
   }).then(() => {
-    return zip.generateAsync({type:"blob"});
+    return zip.generateAsync({type:"binarystring"});
   }).then(content => {
     Progress.hide({ sticky: true });
     showToast('Backup complete!', 'success');
diff --git a/core b/core
index c30775453..6e94cf77a 160000
--- a/core
+++ b/core
@@ -1 +1 @@
-Subproject commit c307754532cf0aa675945f98be46fdc9aa5d96af
+Subproject commit 6e94cf77a2b355389dcd5efa55e2249a9b31983c