diff --git a/index.html b/index.html
index 9d89f52..9ed770f 100644
--- a/index.html
+++ b/index.html
@@ -426,7 +426,7 @@ while (await new Promise(o => setTimeout(o, 1000, true))) {
             if (save) try {
                 $.all('#actions > button').forEach(e => e.disabled = true);
                 var writable = await filehandle.createWritable({ mode: 'exclusive' });
-                let data = await filehandle.getFile().then(f => Rpc2.invoke('merge', { params: [new Uint8Array(f.arrayBuffer()).toBase64()] }));
+                let data = await filehandle.getFile().then(f => f.arrayBuffer()).then(b => Rpc2.invoke('merge', { params: [new Uint8Array(b).toBase64()] }));
                 await writable.write(Uint8Array.fromBase64(data));
                 await writable.close();
                 await Rpc2.notify('close');