diff --git a/index.html b/index.html
index 8fea1bb..be4fd42 100644
--- a/index.html
+++ b/index.html
@@ -426,7 +426,8 @@ while (await new Promise(o => setTimeout(o, 1000, true))) {
             if (save) try {
                 $.all('#actions > button').forEach(e => e.disabled = true);
                 let writable = await filehandle.createWritable({ mode: 'exclusive' });
-                let data = await filehandle.getFile().arrayBuffer().then(b => Rpc2.invoke('merge', { params: [new Uint8Array(b).toBase64()] }));
+                let buffer = await filehandle.getFile().then(f => f.arrayBuffer());
+                let data = await Rpc2.invoke('merge', { params: [new Uint8Array(buffer).toBase64()] });
                 await writable.write(Uint8Array.fromBase64(data));
                 await writable.close();
                 await Rpc2.notify('close');