diff --git a/bot.go b/bot.go
index 536fb78..b7d3c14 100644
--- a/bot.go
+++ b/bot.go
@@ -221,7 +221,7 @@ func botMsgExportAll(m *tb.Message) {
 
 	d := tb.Document{}
 	d.File = tb.FromReader(bytes.NewReader(b))
-	d.FileName = fmt.Sprintf("%s_backup.zip", time.Now().Format("20060102150405"))
+	d.FileName = fmt.Sprintf("%s.backup.zip", time.Now().Format("20060102150405"))
 	d.Caption = d.FileName
 
 	c = TGCommand{