diff --git a/doorlockd/CMakeLists.txt b/doorlockd/CMakeLists.txt
index 2dfde31..168d2a6 100644
--- a/doorlockd/CMakeLists.txt
+++ b/doorlockd/CMakeLists.txt
@@ -81,7 +81,9 @@ set(DOORLOCK_CLIENT_SRCS
     client/qrwidget.cpp
     client/qrwidget.h
     client/doorlock-client.cpp
-    client/mainwindow.h)
+    client/mainwindow.h
+    client/mainwindow.cpp
+    client/mainwindow.ui)
 
 add_library(doorlock STATIC ${LIBDOORLOCK_SRCS})
 target_link_libraries(doorlock jsoncpp ldap ${Boost_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
@@ -91,6 +93,7 @@ target_link_libraries(doorlockd doorlock)
 
 add_executable(doorlock-client ${DOORLOCK_CLIENT_SRCS})
 target_link_libraries(doorlock-client doorlock qrencode Qt5::Widgets)
+target_include_directories(doorlock-client PRIVATE ${CMAKE_SOURCE_DIR})
 
 install(TARGETS doorlockd DESTINATION sbin/)
 install(TARGETS doorlock-client DESTINATION bin/)
diff --git a/doorlockd/client/mainwindow.cpp b/doorlockd/client/mainwindow.cpp
new file mode 100644
index 0000000..8b45670
--- /dev/null
+++ b/doorlockd/client/mainwindow.cpp
@@ -0,0 +1,19 @@
+#include "mainwindow.h"
+#include "ui_mainwindow.h"
+
+MainWindow::MainWindow(QWidget *parent) :
+    QWidget(parent),
+    ui(new Ui::MainWindow)
+{
+    ui->setupUi(this);
+}
+
+MainWindow::~MainWindow()
+{
+    delete ui;
+}
+
+void MainWindow::setQRCode(const std::string &token)
+{
+    ui->qrwidget->setQRData(token);
+}
diff --git a/doorlockd/client/mainwindow.h b/doorlockd/client/mainwindow.h
index c7388f0..a78f3c1 100644
--- a/doorlockd/client/mainwindow.h
+++ b/doorlockd/client/mainwindow.h
@@ -1,42 +1,24 @@
 #ifndef MAINWINDOW_H
 #define MAINWINDOW_H
 
-#include <QApplication>
-#include <QHBoxLayout>
-#include <QMainWindow>
-#include <QStatusBar>
+#include <QWidget>
 
-#include "qrwidget.h"
+namespace Ui {
+class MainWindow;
+}
 
-class MainWindow : public QMainWindow
+class MainWindow : public QWidget
 {
+    Q_OBJECT
+
 public:
-    MainWindow() :
-        QMainWindow()
-    {
-        layout = new QHBoxLayout;
+    explicit MainWindow(QWidget *parent = 0);
+    ~MainWindow();
 
-        _qrWidget = new QRWidget;
-        layout->addWidget(_qrWidget);
-
-        QWidget* window = new QWidget;
-        window->setLayout(layout);
-
-        setCentralWidget(window);
-    }
-
-    MainWindow(const MainWindow&);
-    MainWindow& operator =(const MainWindow&);
-
-    void setQRCode(const std::string &str)
-    {
-        _qrWidget->setQRData(str);
-    }
+    void setQRCode(const std::string &token);
 
 private:
-
-    QHBoxLayout* layout = { nullptr };
-    QRWidget* _qrWidget = { nullptr };
+    Ui::MainWindow *ui;
 };
 
-#endif
+#endif // MAINWINDOW_H
diff --git a/doorlockd/client/mainwindow.ui b/doorlockd/client/mainwindow.ui
new file mode 100644
index 0000000..5c0a37c
--- /dev/null
+++ b/doorlockd/client/mainwindow.ui
@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QWidget" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>886</width>
+    <height>610</height>
+   </rect>
+  </property>
+  <property name="maximumSize">
+   <size>
+    <width>886</width>
+    <height>610</height>
+   </size>
+  </property>
+  <property name="windowTitle">
+   <string>Form</string>
+  </property>
+  <layout class="QGridLayout" name="gridLayout">
+   <item row="0" column="0">
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QRWidget" name="qrwidget" native="true">
+       <property name="enabled">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>QRWidget</class>
+   <extends>QWidget</extends>
+   <header>client/qrwidget.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections/>
+</ui>