diff --git a/kybackup/aboutdialog.cpp b/kybackup/aboutdialog.cpp
index 6f93f46..b9dc7cf 100755
--- a/kybackup/aboutdialog.cpp
+++ b/kybackup/aboutdialog.cpp
@@ -25,6 +25,7 @@ AboutDialog::AboutDialog(QWidget *parent) :
     connect(GlobelBackupInfo::inst().getGlobalSignals(), &GlobalSignals::themeIconChanged, this, [=](){
         this->setAppIcon(QIcon::fromTheme(THEME_YHKYLIN_BACKUP_TOOLS, QIcon(":/images/yhkylin-backup-tools.png")));
     });
+    setFixedSize(420, 520);
 }
 
 QString AboutDialog::getBackupVersion()