diff --git a/src/capture/capturemodification.h b/src/capture/capturemodification.h
index 84b16d00..96a777c1 100644
--- a/src/capture/capturemodification.h
+++ b/src/capture/capturemodification.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef CAPTURECHANGE_H
-#define CAPTURECHANGE_H
+#pragma once
 
 #include "src/capture/widget/capturebutton.h"
 #include <QObject>
@@ -51,5 +50,3 @@ protected:
     int m_thickness;
 
 };
-
-#endif // CAPTURECHANGE_H
diff --git a/src/capture/screenshot.h b/src/capture/screenshot.h
index f37c1bcc..ff1a9ceb 100644
--- a/src/capture/screenshot.h
+++ b/src/capture/screenshot.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef SCREENSHOT_H
-#define SCREENSHOT_H
+#pragma once
 
 #include <QPixmap>
 #include <QRect>
@@ -49,5 +48,3 @@ private:
     void paintInPainter(QPainter &, const CaptureModification *);
 
 };
-
-#endif // SCREENSHOT_H
diff --git a/src/capture/tools/applauncher.h b/src/capture/tools/applauncher.h
index 8247ff07..44e677ea 100644
--- a/src/capture/tools/applauncher.h
+++ b/src/capture/tools/applauncher.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef APPOPENER_H
-#define APPOPENER_H
+#pragma once
 
 #include "capturetool.h"
 
@@ -42,5 +41,3 @@ public:
 
     void onPressed() override;
 };
-
-#endif // APPOPENER_H
diff --git a/src/capture/tools/arrowtool.h b/src/capture/tools/arrowtool.h
index 419e5dd4..8f617a3b 100644
--- a/src/capture/tools/arrowtool.h
+++ b/src/capture/tools/arrowtool.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef ARROWTOOL_H
-#define ARROWTOOL_H
+#pragma once
 
 #include "capturetool.h"
 
@@ -43,5 +42,3 @@ public:
     void onPressed() override;
 
 };
-
-#endif // ARROWTOOL_H
diff --git a/src/capture/tools/blurtool.h b/src/capture/tools/blurtool.h
index 31f41073..5f864928 100644
--- a/src/capture/tools/blurtool.h
+++ b/src/capture/tools/blurtool.h
@@ -15,9 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-
-#ifndef BLURTOOL_H
-#define BLURTOOL_H
+#pragma once
 
 #include "capturetool.h"
 
@@ -47,5 +45,3 @@ private:
     bool needsAdjustment(const QPoint &p0, const QPoint &p1) const;
 
 };
-
-#endif // BLURTOOL_H
diff --git a/src/capture/tools/capturetool.h b/src/capture/tools/capturetool.h
index beda6dd6..86a2710a 100644
--- a/src/capture/tools/capturetool.h
+++ b/src/capture/tools/capturetool.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef CAPTURETOOL_H
-#define CAPTURETOOL_H
+#pragma once
 
 #include <QObject>
 #include <QVector>
@@ -71,5 +70,3 @@ public slots:
     virtual void onPressed() = 0;
 
 };
-
-#endif // CAPTURETOOL_H
diff --git a/src/capture/tools/circletool.h b/src/capture/tools/circletool.h
index bbd85e99..40976574 100644
--- a/src/capture/tools/circletool.h
+++ b/src/capture/tools/circletool.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef CIRCLETOOL_H
-#define CIRCLETOOL_H
+#pragma once
 
 #include "capturetool.h"
 
@@ -43,5 +42,3 @@ public:
     void onPressed() override;
 
 };
-
-#endif // CIRCLETOOL_H
diff --git a/src/capture/tools/copytool.h b/src/capture/tools/copytool.h
index cd1f1fd5..a2457c32 100644
--- a/src/capture/tools/copytool.h
+++ b/src/capture/tools/copytool.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef COPYTOOL_H
-#define COPYTOOL_H
+#pragma once
 
 #include "capturetool.h"
 
@@ -43,5 +42,3 @@ public:
     void onPressed() override;
 
 };
-
-#endif // COPYTOOL_H
diff --git a/src/capture/tools/exittool.h b/src/capture/tools/exittool.h
index c45a455c..fbe46169 100644
--- a/src/capture/tools/exittool.h
+++ b/src/capture/tools/exittool.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef EXITTOOL_H
-#define EXITTOOL_H
+#pragma once
 
 #include "capturetool.h"
 
@@ -43,5 +42,3 @@ public:
     void onPressed() override;
 
 };
-
-#endif // EXITTOOL_H
diff --git a/src/capture/tools/imguruploadertool.h b/src/capture/tools/imguruploadertool.h
index 1a350b7e..a67b2b4c 100644
--- a/src/capture/tools/imguruploadertool.h
+++ b/src/capture/tools/imguruploadertool.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef IMGURUPLOADERTOOL_H
-#define IMGURUPLOADERTOOL_H
+#pragma once
 
 #include "capturetool.h"
 
@@ -43,5 +42,3 @@ public:
     void onPressed() override;
 
 };
-
-#endif // IMGURUPLOADERTOOL_H
diff --git a/src/capture/tools/linetool.h b/src/capture/tools/linetool.h
index 80e6d8af..a68a1b20 100644
--- a/src/capture/tools/linetool.h
+++ b/src/capture/tools/linetool.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef LINETOOL_H
-#define LINETOOL_H
+#pragma once
 
 #include "capturetool.h"
 
@@ -46,5 +45,3 @@ private:
     bool needsAdjustment(const QPoint &p0, const QPoint &p1) const;
 
 };
-
-#endif // LINETOOL_H
diff --git a/src/capture/tools/markertool.h b/src/capture/tools/markertool.h
index 99d919d7..be8524f9 100644
--- a/src/capture/tools/markertool.h
+++ b/src/capture/tools/markertool.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef MARKERTOOL_H
-#define MARKERTOOL_H
+#pragma once
 
 #include "capturetool.h"
 
@@ -46,5 +45,3 @@ private:
     bool needsAdjustment(const QPoint &p0, const QPoint &p1) const;
 
 };
-
-#endif // MARKERTOOL_H
diff --git a/src/capture/tools/movetool.h b/src/capture/tools/movetool.h
index 761af8ce..a0b81587 100644
--- a/src/capture/tools/movetool.h
+++ b/src/capture/tools/movetool.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef MOVETOOL_H
-#define MOVETOOL_H
+#pragma once
 
 #include "capturetool.h"
 
@@ -43,5 +42,3 @@ public:
     void onPressed() override;
 
 };
-
-#endif // MOVETOOL_H
diff --git a/src/capture/tools/penciltool.h b/src/capture/tools/penciltool.h
index f8725119..68b44a78 100644
--- a/src/capture/tools/penciltool.h
+++ b/src/capture/tools/penciltool.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef PENCILTOOL_H
-#define PENCILTOOL_H
+#pragma once
 
 #include "capturetool.h"
 
@@ -43,5 +42,3 @@ public:
     void onPressed() override;
 
 };
-
-#endif // PENCILTOOL_H
diff --git a/src/capture/tools/rectangletool.h b/src/capture/tools/rectangletool.h
index e96dc54d..660b67e1 100644
--- a/src/capture/tools/rectangletool.h
+++ b/src/capture/tools/rectangletool.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef RECTANGLELTOOL_H
-#define RECTANGLELTOOL_H
+#pragma once
 
 #include "capturetool.h"
 
@@ -43,5 +42,3 @@ public:
     void onPressed() override;
 
 };
-
-#endif // RECTANGLELTOOL_H
diff --git a/src/capture/tools/savetool.h b/src/capture/tools/savetool.h
index 72d22133..a565fc57 100644
--- a/src/capture/tools/savetool.h
+++ b/src/capture/tools/savetool.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef SAVETOOL_H
-#define SAVETOOL_H
+#pragma once
 
 #include "capturetool.h"
 
@@ -43,5 +42,3 @@ public:
     void onPressed() override;
 
 };
-
-#endif // SAVETOOL_H
diff --git a/src/capture/tools/selectiontool.h b/src/capture/tools/selectiontool.h
index 00ce7b62..ddadb0af 100644
--- a/src/capture/tools/selectiontool.h
+++ b/src/capture/tools/selectiontool.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef SELECTIONTOOL_H
-#define SELECTIONTOOL_H
+#pragma once
 
 #include "capturetool.h"
 
@@ -43,5 +42,3 @@ public:
     void onPressed() override;
 
 };
-
-#endif // SELECTIONTOOL_H
diff --git a/src/capture/tools/sizeindicatortool.h b/src/capture/tools/sizeindicatortool.h
index 7cd793f2..6cbc6182 100644
--- a/src/capture/tools/sizeindicatortool.h
+++ b/src/capture/tools/sizeindicatortool.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef SIZEINDICATORTOOL_H
-#define SIZEINDICATORTOOL_H
+#pragma once
 
 #include "capturetool.h"
 
@@ -43,5 +42,3 @@ public:
     void onPressed() override;
 
 };
-
-#endif // SIZEINDICATORTOOL_H
diff --git a/src/capture/tools/toolfactory.h b/src/capture/tools/toolfactory.h
index 6087e448..949e483c 100644
--- a/src/capture/tools/toolfactory.h
+++ b/src/capture/tools/toolfactory.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef TOOLFACTORY_H
-#define TOOLFACTORY_H
+#pragma once
 
 #include <QObject>
 #include "src/capture/widget/capturebutton.h"
@@ -43,5 +42,3 @@ public:
             QObject *parent = nullptr);
 
 };
-
-#endif // TOOLFACTORY_H
diff --git a/src/capture/tools/undotool.h b/src/capture/tools/undotool.h
index 11fa2a24..e59640f4 100644
--- a/src/capture/tools/undotool.h
+++ b/src/capture/tools/undotool.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef UNDOTOOL_H
-#define UNDOTOOL_H
+#pragma once
 
 #include "capturetool.h"
 
@@ -43,5 +42,3 @@ public:
     void onPressed() override;
 
 };
-
-#endif // UNDOTOOL_H
diff --git a/src/capture/widget/buttonhandler.h b/src/capture/widget/buttonhandler.h
index 3b819e58..0fa0f780 100644
--- a/src/capture/widget/buttonhandler.h
+++ b/src/capture/widget/buttonhandler.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef BUTTONHANDLER_H
-#define BUTTONHANDLER_H
+#pragma once
 
 #include "capturebutton.h"
 #include <QVector>
@@ -86,5 +85,3 @@ private:
     void adjustHorizontalCenter(QPoint &center);
 
 };
-
-#endif // BUTTONHANDLER_H
diff --git a/src/capture/widget/capturebutton.h b/src/capture/widget/capturebutton.h
index 7a9d1225..8e0dab35 100644
--- a/src/capture/widget/capturebutton.h
+++ b/src/capture/widget/capturebutton.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef BUTTON_H
-#define BUTTON_H
+#pragma once
 
 #include <QPushButton>
 #include <QMap>
@@ -92,5 +91,3 @@ private:
     void updateIcon();
 
 };
-
-#endif // BUTTON_H
diff --git a/src/capture/widget/capturewidget.h b/src/capture/widget/capturewidget.h
index ba07c3d2..bca575dc 100644
--- a/src/capture/widget/capturewidget.h
+++ b/src/capture/widget/capturewidget.h
@@ -21,8 +21,7 @@
 // Based on KDE's KSnapshot regiongrabber.cpp, revision 796531, Copyright 2007 Luca Gugelmann <lucag@student.ethz.ch>
 // released under the GNU LGPL  <http://www.gnu.org/licenses/old-licenses/library.txt>
 
-#ifndef CAPTUREWIDGET_H
-#define CAPTUREWIDGET_H
+#pragma once
 
 #include "capturebutton.h"
 #include "src/capture/tools/capturetool.h"
@@ -141,5 +140,3 @@ private:
     ConfigHandler m_config;
 
 };
-
-#endif // CAPTUREWIDGET_H
diff --git a/src/capture/widget/colorpicker.h b/src/capture/widget/colorpicker.h
index 197f49f1..fc3d5516 100644
--- a/src/capture/widget/colorpicker.h
+++ b/src/capture/widget/colorpicker.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef COLORPICKER_H
-#define COLORPICKER_H
+#pragma once
 
 #include <QWidget>
 
@@ -46,5 +45,3 @@ private:
     QColor m_uiColor, m_drawColor;
 
 };
-
-#endif // COLORPICKER_H
diff --git a/src/capture/widget/notifierbox.h b/src/capture/widget/notifierbox.h
index 78616f67..b01b5fc9 100644
--- a/src/capture/widget/notifierbox.h
+++ b/src/capture/widget/notifierbox.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef NOTIFIERBOX_H
-#define NOTIFIERBOX_H
+#pragma once
 
 #include <QWidget>
 
@@ -41,5 +40,3 @@ private:
     QColor m_bgColor;
     QColor m_foregroundColor;
 };
-
-#endif // NOTIFIERBOX_H
diff --git a/src/capture/workers/imgur/imagelabel.h b/src/capture/workers/imgur/imagelabel.h
index e723c404..f11379de 100644
--- a/src/capture/workers/imgur/imagelabel.h
+++ b/src/capture/workers/imgur/imagelabel.h
@@ -18,8 +18,7 @@
 // This code is a modified version of the KDE software Spectacle
 // /src/Gui/KSImageWidget.h commit cbbd6d45f6426ccbf1a82b15fdf98613ccccbbe9
 
-#ifndef IMAGELABEL_H
-#define IMAGELABEL_H
+#pragma once
 
 #include <QGuiApplication>
 #include <QStyleHints>
@@ -55,5 +54,3 @@ private:
     QPoint                     m_dragStartPosition;
 
 };
-
-#endif // IMAGELABEL_H
diff --git a/src/capture/workers/imgur/imguruploader.h b/src/capture/workers/imgur/imguruploader.h
index 1de45fef..392c932b 100644
--- a/src/capture/workers/imgur/imguruploader.h
+++ b/src/capture/workers/imgur/imguruploader.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef IMGURUPLOADER_H
-#define IMGURUPLOADER_H
+#pragma once
 
 #include <QWidget>
 #include <QUrl>
@@ -64,5 +63,3 @@ private:
     void upload();
     void onUploadOk();
 };
-
-#endif // IMGURUPLOADER_H
diff --git a/src/capture/workers/imgur/loadspinner.h b/src/capture/workers/imgur/loadspinner.h
index dc802211..93843bf5 100644
--- a/src/capture/workers/imgur/loadspinner.h
+++ b/src/capture/workers/imgur/loadspinner.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef LOADSPINNER_H
-#define LOADSPINNER_H
+#pragma once
 
 #include <QWidget>
 
@@ -49,5 +48,3 @@ private:
     QRect  m_frame;
     void updateFrame();
 };
-
-#endif // LOADSPINNER_H
diff --git a/src/capture/workers/imgur/notificationwidget.h b/src/capture/workers/imgur/notificationwidget.h
index 5e419c6a..02e5df2e 100644
--- a/src/capture/workers/imgur/notificationwidget.h
+++ b/src/capture/workers/imgur/notificationwidget.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef NOTIFICATIONWIDGET_H
-#define NOTIFICATIONWIDGET_H
+#pragma once
 
 #include <QWidget>
 
@@ -46,5 +45,3 @@ private:
     void animatedHide();
 
 };
-
-#endif // NOTIFICATIONWIDGET_H
diff --git a/src/capture/workers/launcher/applauncherwidget.h b/src/capture/workers/launcher/applauncherwidget.h
index 3d59ffe4..bb785752 100644
--- a/src/capture/workers/launcher/applauncherwidget.h
+++ b/src/capture/workers/launcher/applauncherwidget.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef APPLAUNCHERWIDGET_H
-#define APPLAUNCHERWIDGET_H
+#pragma once
 
 #include "src/utils/desktopfileparse.h"
 #include <QWidget>
@@ -58,5 +57,3 @@ private:
     QListWidget *m_filterList;
     QTabWidget *m_tabWidget;
 };
-
-#endif // APPLAUNCHERWIDGET_H
diff --git a/src/capture/workers/launcher/launcheritemdelegate.h b/src/capture/workers/launcher/launcheritemdelegate.h
index 3a552ff8..5b311d8d 100644
--- a/src/capture/workers/launcher/launcheritemdelegate.h
+++ b/src/capture/workers/launcher/launcheritemdelegate.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef LAUNCHERITEMDELEGATE_H
-#define LAUNCHERITEMDELEGATE_H
+#pragma once
 
 #include "src/utils/desktopfileparse.h"
 #include <QStyledItemDelegate>
@@ -36,5 +35,3 @@ public:
 private:
 
 };
-
-#endif // LAUNCHERITEMDELEGATE_H
diff --git a/src/capture/workers/launcher/openwithprogram.h b/src/capture/workers/launcher/openwithprogram.h
index f144561d..f3ad602a 100644
--- a/src/capture/workers/launcher/openwithprogram.h
+++ b/src/capture/workers/launcher/openwithprogram.h
@@ -15,11 +15,8 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef OPENWITHPROGRAM_H
-#define OPENWITHPROGRAM_H
+#pragma once
 
 #include <QPixmap>
 
 void showOpenWithMenu(const QPixmap &capture);
-
-#endif // OPENWITHPROGRAM_H
diff --git a/src/capture/workers/launcher/terminallauncher.h b/src/capture/workers/launcher/terminallauncher.h
index bc33365b..ccfb4ec7 100644
--- a/src/capture/workers/launcher/terminallauncher.h
+++ b/src/capture/workers/launcher/terminallauncher.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef TERMINALLAUNCHER_H
-#define TERMINALLAUNCHER_H
+#pragma once
 
 #include <QObject>
 
@@ -35,5 +34,3 @@ public:
 private:
     static TerminalApp getPreferedTerminal();
 };
-
-#endif // TERMINALLAUNCHER_H
diff --git a/src/capture/workers/screenshotsaver.h b/src/capture/workers/screenshotsaver.h
index 948ffcc6..3e8df01c 100644
--- a/src/capture/workers/screenshotsaver.h
+++ b/src/capture/workers/screenshotsaver.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef SCREENSHOTSAVER_H
-#define SCREENSHOTSAVER_H
+#pragma once
 
 class QPixmap;
 class QString;
@@ -31,5 +30,3 @@ public:
     void saveToFilesystemGUI(const QPixmap &capture);
 
 };
-
-#endif // SCREENSHOTSAVER_H
diff --git a/src/cli/commandargument.h b/src/cli/commandargument.h
index 031640b9..20f9fdc8 100644
--- a/src/cli/commandargument.h
+++ b/src/cli/commandargument.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef COMMANDARGUMENT_H
-#define COMMANDARGUMENT_H
+#pragma once
 
 #include <QString>
 
@@ -41,5 +40,3 @@ private:
     QString m_description;
 
 };
-
-#endif // COMMANDARGUMENT_H
diff --git a/src/cli/commandlineparser.h b/src/cli/commandlineparser.h
index 48eda57c..587ff85e 100644
--- a/src/cli/commandlineparser.h
+++ b/src/cli/commandlineparser.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef COMMANDLINEPARSER_H
-#define COMMANDLINEPARSER_H
+#pragma once
 
 #include "src/cli/commandargument.h"
 #include "src/cli/commandoption.h"
@@ -90,5 +89,3 @@ private:
                         Node *const actualNode);
 
 };
-
-#endif // COMMANDLINEPARSER_H
diff --git a/src/cli/commandoption.h b/src/cli/commandoption.h
index a711eca0..04e413ab 100644
--- a/src/cli/commandoption.h
+++ b/src/cli/commandoption.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef COMMANDOPTION_H
-#define COMMANDOPTION_H
+#pragma once
 
 #include <QStringList>
 #include <functional>
@@ -64,5 +63,3 @@ private:
     QString m_errorMsg;
 
 };
-
-#endif // COMMANDOPTION_H
diff --git a/src/config/buttonlistview.h b/src/config/buttonlistview.h
index f0ff902f..6dfd4424 100644
--- a/src/config/buttonlistview.h
+++ b/src/config/buttonlistview.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef BUTTONLISTVIEW_H
-#define BUTTONLISTVIEW_H
+#pragma once
 
 #include "src/capture/widget/capturebutton.h"
 #include <QListWidget>
@@ -42,5 +41,3 @@ private:
     void updateActiveButtons(QListWidgetItem *);
 
 };
-
-#endif // BUTTONLISTVIEW_H
diff --git a/src/config/clickablelabel.h b/src/config/clickablelabel.h
index 67c4c2fb..9ddc0186 100644
--- a/src/config/clickablelabel.h
+++ b/src/config/clickablelabel.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef CLICKABLELABEL_H
-#define CLICKABLELABEL_H
+#pragma once
 
 #include <QLabel>
 
@@ -34,5 +33,3 @@ private:
     void mousePressEvent (QMouseEvent *);
 
 };
-
-#endif // CLICKABLELABEL_H
diff --git a/src/config/configwindow.h b/src/config/configwindow.h
index 6c0e7b4c..088002da 100644
--- a/src/config/configwindow.h
+++ b/src/config/configwindow.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef CONFIGURATION_H
-#define CONFIGURATION_H
+#pragma once
 
 #include <QTabWidget>
 
@@ -43,5 +42,3 @@ private:
     QFileSystemWatcher *m_configWatcher;
 
 };
-
-#endif // CONFIGURATION_H
diff --git a/src/config/extendedslider.h b/src/config/extendedslider.h
index 533e42bc..78429ce1 100644
--- a/src/config/extendedslider.h
+++ b/src/config/extendedslider.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef EXTENDEDSLIDER_H
-#define EXTENDEDSLIDER_H
+#pragma once
 
 #include <QSlider>
 #include <QTimer>
@@ -41,5 +40,3 @@ private:
     QTimer m_timer;
 
 };
-
-#endif // EXTENDEDSLIDER_H
diff --git a/src/config/filenameeditor.h b/src/config/filenameeditor.h
index 53e3dcb5..a2916e06 100644
--- a/src/config/filenameeditor.h
+++ b/src/config/filenameeditor.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef FILENAMEEDITOR_H
-#define FILENAMEEDITOR_H
+#pragma once
 
 #include <QWidget>
 #include <QPointer>
@@ -56,5 +55,3 @@ private slots:
     void resetName();
 
 };
-
-#endif // FILENAMEEDITOR_H
diff --git a/src/config/geneneralconf.h b/src/config/geneneralconf.h
index 5424c40b..cfe603b2 100644
--- a/src/config/geneneralconf.h
+++ b/src/config/geneneralconf.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef GENENERALCONF_H
-#define GENENERALCONF_H
+#pragma once
 
 #include <QWidget>
 
@@ -58,5 +57,3 @@ private:
     void initAutostart();
 
 };
-
-#endif // GENENERALCONF_H
diff --git a/src/config/strftimechooserwidget.h b/src/config/strftimechooserwidget.h
index b718c4da..5628010e 100644
--- a/src/config/strftimechooserwidget.h
+++ b/src/config/strftimechooserwidget.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef STRFTIMECHOOSERWIDGET_H
-#define STRFTIMECHOOSERWIDGET_H
+#pragma once
 
 #include <QWidget>
 
@@ -33,5 +32,3 @@ private:
     static QMap<QString, QString> m_buttonData;
 
 };
-
-#endif // STRFTIMECHOOSERWIDGET_H
diff --git a/src/config/uicoloreditor.h b/src/config/uicoloreditor.h
index 49887112..5c253946 100644
--- a/src/config/uicoloreditor.h
+++ b/src/config/uicoloreditor.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef UICOLORPICKER_H
-#define UICOLORPICKER_H
+#pragma once
 
 #include "color_wheel.hpp"
 #include "src/capture/widget/capturebutton.h"
@@ -58,5 +57,3 @@ private:
     void initButtons();
 
 };
-
-#endif // UICOLORPICKER_H
diff --git a/src/config/visualseditor.h b/src/config/visualseditor.h
index 564f4eec..bd754382 100644
--- a/src/config/visualseditor.h
+++ b/src/config/visualseditor.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef VISUALSEDITOR_H
-#define VISUALSEDITOR_H
+#pragma once
 
 #include <QWidget>
 
@@ -46,5 +45,3 @@ private:
     void initWidgets();
     void initOpacitySlider();
 };
-
-#endif // VISUALSEDITOR_H
diff --git a/src/core/controller.h b/src/core/controller.h
index 053e171c..0d85d76e 100644
--- a/src/core/controller.h
+++ b/src/core/controller.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef CONTROLLER_H
-#define CONTROLLER_H
+#pragma once
 
 #include <QObject>
 #include <QPointer>
@@ -66,5 +65,3 @@ private:
     QPointer<QSystemTrayIcon> m_trayIcon;
 
 };
-
-#endif // CONTROLLER_H
diff --git a/src/core/flameshotdbusadapter.h b/src/core/flameshotdbusadapter.h
index 80ecb599..e649e1b4 100644
--- a/src/core/flameshotdbusadapter.h
+++ b/src/core/flameshotdbusadapter.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef FLAMESHOTDBUSADAPTER_H
-#define FLAMESHOTDBUSADAPTER_H
+#pragma once
 
 #include <QtDBus/QDBusAbstractAdaptor>
 #include "src/core/controller.h"
@@ -41,5 +40,3 @@ public slots:
     Q_NOREPLY void trayIconEnabled(bool enabled);
 
 };
-
-#endif // FLAMESHOTDBUSADAPTER_H
diff --git a/src/core/globalshortcutfilter.h b/src/core/globalshortcutfilter.h
index 7c912b3b..9b63437f 100644
--- a/src/core/globalshortcutfilter.h
+++ b/src/core/globalshortcutfilter.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef GLOBALSHORTCUTFILTER_H
-#define GLOBALSHORTCUTFILTER_H
+#pragma once
 
 #include <QObject>
 #include <QAbstractNativeEventFilter>
@@ -38,5 +37,3 @@ private:
     bool unregisterShortcut(quint32 nativeKey, quint32 nativeMods);
 
 };
-
-#endif // GLOBALSHORTCUTFILTER_H
diff --git a/src/core/resourceexporter.h b/src/core/resourceexporter.h
index 91bac577..995aafe4 100644
--- a/src/core/resourceexporter.h
+++ b/src/core/resourceexporter.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef RESOURCEEXPORTER_H
-#define RESOURCEEXPORTER_H
+#pragma once
 
 #include <QPixmap>
 
@@ -30,5 +29,3 @@ public:
     void captureToImgur(const QPixmap &p);
     void captureToProgram(const QPixmap &p);
 };
-
-#endif // RESOURCEEXPORTER_H
diff --git a/src/infowindow.h b/src/infowindow.h
index 96d7937c..3732db2a 100644
--- a/src/infowindow.h
+++ b/src/infowindow.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef INFOWINDOW_H
-#define INFOWINDOW_H
+#pragma once
 
 #include <QWidget>
 
@@ -39,5 +38,3 @@ private:
     static QVector<const char *> m_description;
 
 };
-
-#endif // INFOWINDOW_H
diff --git a/src/utils/confighandler.h b/src/utils/confighandler.h
index 989dc316..b1e6658c 100644
--- a/src/utils/confighandler.h
+++ b/src/utils/confighandler.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef CONFIGHANDLER_H
-#define CONFIGHANDLER_H
+#pragma once
 
 #include "src/capture/widget/capturebutton.h"
 #include <QList>
@@ -80,5 +79,3 @@ private:
     QList<int> fromButtonToInt(const QList<CaptureButton::ButtonType> &l);
 
 };
-
-#endif // CONFIGHANDLER_H
diff --git a/src/utils/dbusutils.h b/src/utils/dbusutils.h
index 96c74ae4..40f80e42 100644
--- a/src/utils/dbusutils.h
+++ b/src/utils/dbusutils.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef TERMINALUTILS_H
-#define TERMINALUTILS_H
+#pragma once
 
 #include "src/cli/commandlineparser.h"
 #include <QDBusConnection>
@@ -38,5 +37,3 @@ public slots:
 private:
     uint m_id;
 };
-
-#endif // TERMINALUTILS_H
diff --git a/src/utils/desktopfileparse.h b/src/utils/desktopfileparse.h
index e50d7105..74b772fe 100644
--- a/src/utils/desktopfileparse.h
+++ b/src/utils/desktopfileparse.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef DESKTOPFILEPARSE_H
-#define DESKTOPFILEPARSE_H
+#pragma once
 
 #include <QIcon>
 #include <QStringList>
@@ -71,5 +70,3 @@ private:
     QIcon m_defaultIcon;
     QList<DesktopAppData> m_appList;
 };
-
-#endif // DESKTOPFILEPARSE_H
diff --git a/src/utils/desktopinfo.h b/src/utils/desktopinfo.h
index c0ce9c18..a28d2d40 100644
--- a/src/utils/desktopinfo.h
+++ b/src/utils/desktopinfo.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef DESKTOPINFO_H
-#define DESKTOPINFO_H
+#pragma once
 
 #include <QString>
 
@@ -44,5 +43,3 @@ private:
     QString DESKTOP_SESSION;
 
 };
-
-#endif // DESKTOPINFO_H
diff --git a/src/utils/filenamehandler.h b/src/utils/filenamehandler.h
index e205435c..2bc569d5 100644
--- a/src/utils/filenamehandler.h
+++ b/src/utils/filenamehandler.h
@@ -15,12 +15,10 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef FILENAMEHANDLER_H
-#define FILENAMEHANDLER_H
+#pragma once
 
 #include <QObject>
 
-
 class FileNameHandler : public QObject
 {
     Q_OBJECT
@@ -47,5 +45,3 @@ private:
     void fixPath(QString &directory, QString &filename);
 
 };
-
-#endif // FILENAMEHANDLER_H
diff --git a/src/utils/screengrabber.h b/src/utils/screengrabber.h
index 5de96955..c1b9a44c 100644
--- a/src/utils/screengrabber.h
+++ b/src/utils/screengrabber.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef SCREENGRABBER_H
-#define SCREENGRABBER_H
+#pragma once
 
 #include "src/utils/desktopinfo.h"
 #include <QObject>
@@ -31,5 +30,3 @@ public:
 private:
     DesktopInfo m_info;
 };
-
-#endif // SCREENGRABBER_H
diff --git a/src/utils/systemnotification.h b/src/utils/systemnotification.h
index e9808215..e97195b0 100644
--- a/src/utils/systemnotification.h
+++ b/src/utils/systemnotification.h
@@ -15,8 +15,7 @@
 //     You should have received a copy of the GNU General Public License
 //     along with Flameshot.  If not, see <http://www.gnu.org/licenses/>.
 
-#ifndef SYSTEMNOTIFICATION_H
-#define SYSTEMNOTIFICATION_H
+#pragma once
 
 #include <QObject>
 
@@ -36,5 +35,3 @@ private:
     QDBusInterface *m_interface;
 
 };
-
-#endif // SYSTEMNOTIFICATION_H