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diff --git a/src/ui/dialog/help/AboutDialog.h b/src/ui/dialog/help/AboutDialog.h
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+/**
+ * Copyright (C) 2021 Saturneric
+ *
+ * This file is part of GpgFrontend.
+ *
+ * GpgFrontend is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GpgFrontend is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GpgFrontend. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The initial version of the source code is inherited from
+ * the gpg4usb project, which is under GPL-3.0-or-later.
+ *
+ * All the source code of GpgFrontend was modified and released by
+ * Saturneric<[email protected]> starting on May 12, 2021.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ */
+
+#ifndef __ABOUTDIALOG_H__
+#define __ABOUTDIALOG_H__
+
+#include "core/GpgContext.h"
+#include "ui/GpgFrontendUI.h"
+#include "ui/dialog/GeneralDialog.h"
+#include "ui/struct/SoftwareVersion.h"
+
+namespace GpgFrontend::UI {
+
+/**
+ * @brief Class containing the main tab of about dialog
+ *
+ */
+class InfoTab : public QWidget {
+  Q_OBJECT
+
+ public:
+  /**
+   * @brief Construct a new Info Tab object
+   *
+   * @param parent
+   */
+  explicit InfoTab(QWidget* parent = nullptr);
+};
+
+/**
+ * @brief Class containing the translator tab of about dialog
+ *
+ */
+class TranslatorsTab : public QWidget {
+  Q_OBJECT
+
+ public:
+  /**
+   * @brief Construct a new Translators Tab object
+   *
+   * @param parent
+   */
+  explicit TranslatorsTab(QWidget* parent = nullptr);
+};
+
+/**
+ * @brief Class containing the main tab of about dialog
+ *
+ */
+class UpdateTab : public QWidget {
+  Q_OBJECT
+
+  QLabel* current_version_label_;  ///<
+  QLabel* latest_version_label_;   ///<
+  QLabel* upgrade_label_;          ///<
+  QProgressBar* pb_;               ///<
+  QString current_version_;        ///<
+  QPushButton* download_button_;   ///<
+
+ public:
+  /**
+   * @brief Construct a new Update Tab object
+   *
+   * @param parent
+   */
+  explicit UpdateTab(QWidget* parent = nullptr);
+
+  /**
+   * @brief Get the Latest Version object
+   *
+   */
+  void getLatestVersion();
+
+ private slots:
+  /**
+   * @brief
+   *
+   * @param version
+   */
+  void slot_show_version_status(const SoftwareVersion& version);
+
+ signals:
+  /**
+   * @brief
+   *
+   * @param data
+   */
+  void SignalReplyFromUpdateServer(QByteArray data);
+};
+
+/**
+ * @brief Class for handling the about dialog
+ *
+ */
+class AboutDialog : public GeneralDialog {
+  Q_OBJECT
+
+ public:
+  /**
+   * @brief Construct a new About Dialog object
+   *
+   * @param defaultIndex
+   * @param parent
+   */
+  explicit AboutDialog(int defaultIndex, QWidget* parent);
+
+ protected:
+  /**
+   * @brief
+   *
+   * @param ev
+   */
+  void showEvent(QShowEvent* ev) override;
+
+ private:
+  UpdateTab* update_tab_;  ///<
+};
+
+}  // namespace GpgFrontend::UI
+
+#endif  // __ABOUTDIALOG_H__