diff --git a/src/mainwindow/mainwindow.cpp b/src/mainwindow/mainwindow.cpp
index b684013..59caba1 100644
--- a/src/mainwindow/mainwindow.cpp
+++ b/src/mainwindow/mainwindow.cpp
@@ -1,3 +1,4 @@
+#include <QProcess>
 #include <QSettings>
 #include <QMimeData>
 #include <QMessageBox>
@@ -5,6 +6,7 @@
 #include <QCloseEvent>
 #include <QDesktopServices>
 
+#include "updater/updaterconst.h"
 #include "common/global.h"
 #include "common/version.h"
 #include "configure/configuredialog.h"
@@ -55,6 +57,7 @@ MainWindow::MainWindow(QWidget* parent) :
 
     CreateActions();
     UpdateRecentContest(true);
+    CheckUpdates(true);
 
     this->activateWindow();
 }
@@ -79,6 +82,15 @@ void MainWindow::UnlockTable()
     detail_table->Unlock();
 }
 
+void MainWindow::CheckUpdates(bool dontShowError)
+{
+    QString dir = QCoreApplication::applicationDirPath();
+    QStringList arguments = { "-c", "-p" };
+    arguments.append(QString("%1").arg(QCoreApplication::applicationPid()));
+    if (dontShowError) arguments.append("-n");
+    QProcess::startDetached(dir + "/" + Updater::UPDATER_NAME, arguments, dir);
+}
+
 // Last contest path
 static QString lastContest;
 
@@ -762,6 +774,11 @@ void MainWindow::on_action_help_triggered()
 
 }
 
+void MainWindow::on_action_update_triggered()
+{
+    CheckUpdates(false);
+}
+
 void MainWindow::on_action_about_triggered()
 {
     QMessageBox msgBox(this);
@@ -789,6 +806,7 @@ void MainWindow::closeEvent(QCloseEvent* event)
 
 void MainWindow::keyPressEvent(QKeyEvent* event)
 {
+    if (!ui->listWidget_recent->count()) return;
     if (!ui->action_close->isEnabled() && (event->key() == Qt::Key_Enter || event->key() == Qt::Key_Return) && ui->listWidget_recent->currentItem()->isSelected())
         on_listWidget_recent_itemDoubleClicked(ui->listWidget_recent->currentItem());
     else QWidget::keyPressEvent(event);
diff --git a/src/mainwindow/mainwindow.h b/src/mainwindow/mainwindow.h
index 74864df..b41c99d 100644
--- a/src/mainwindow/mainwindow.h
+++ b/src/mainwindow/mainwindow.h
@@ -45,6 +45,9 @@ class MainWindow : public QMainWindow
     void LockTable();
     void UnlockTable();
 
+    /// 检查更新，是否只当有更新时才显示对话框
+    void CheckUpdates(bool dontShowError);
+
     /// 更新最近打开的竞赛列表，是否更新 listWidget_recent
     void UpdateRecentContest(bool);
 
@@ -106,6 +109,7 @@ private slots:
 
     // Help menu actions
     void on_action_help_triggered();
+    void on_action_update_triggered();
     void on_action_about_triggered();
 
 protected:
diff --git a/src/mainwindow/mainwindow.ui b/src/mainwindow/mainwindow.ui
index f8b24df..9be1d33 100644
--- a/src/mainwindow/mainwindow.ui
+++ b/src/mainwindow/mainwindow.ui
@@ -205,6 +205,7 @@ QMainWindow
      <string>帮助(&amp;H)</string>
     </property>
     <addaction name="action_help"/>
+    <addaction name="action_update"/>
     <addaction name="separator"/>
     <addaction name="action_about"/>
    </widget>
@@ -343,6 +344,11 @@ QMainWindow
     <string>F1</string>
    </property>
   </action>
+  <action name="action_update">
+   <property name="text">
+    <string>检查更新(&amp;U)...</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <resources>