diff --git a/colorstxtwizard.h b/colorstxtwizard.h
index 4d2f86a..b1e0723 100644
--- a/colorstxtwizard.h
+++ b/colorstxtwizard.h
@@ -53,7 +53,7 @@ class TextureFoldersPage : public QWizardPage
 public:
     TextureFoldersPage(QWidget *parent = nullptr);
 
-    bool isComplete() const;
+    bool isComplete() const override;
 private slots:
     void add();
     void rem();
diff --git a/configdialog.h b/configdialog.h
index f2cad34..856de14 100644
--- a/configdialog.h
+++ b/configdialog.h
@@ -35,7 +35,7 @@ class ConfigDialog : public QDialog
 
 public:
     explicit ConfigDialog(const ConfigSettings &settings, MainWindow *app, QWidget *parent = nullptr);
-    ~ConfigDialog();
+    ~ConfigDialog() override;
 
     ConfigSettings getSettings() const;
     void setSettings(const ConfigSettings &value);
diff --git a/geometrywidget.h b/geometrywidget.h
index 858be2e..703392d 100644
--- a/geometrywidget.h
+++ b/geometrywidget.h
@@ -21,7 +21,7 @@ class GeometryWidget : public QWidget
 
 public:
     explicit GeometryWidget(QWidget *parent = nullptr);
-    ~GeometryWidget();
+    ~GeometryWidget() override;
 
     bool set(const QString& geomStr, Geometry::Format format = Geometry::FormatUnknown); //{ return set(geomStr.toStdString().c_str(), format); }
     bool setDefault() { return set(""); }
diff --git a/mainwindow.h b/mainwindow.h
index 0fda78c..e84f814 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -38,7 +38,7 @@ class MainWindow : public QMainWindow
 
 public:
     explicit MainWindow(Translator *translator, QWidget *parent = nullptr);
-    ~MainWindow();
+    ~MainWindow() override;
 
     enum class GeometryGranularity {
         unspecified = -1,
@@ -59,11 +59,11 @@ public:
 public slots:
     void startColorsTxtAssistant();
 protected:
-    void closeEvent(QCloseEvent* event);
+    void closeEvent(QCloseEvent* event) override;
     // this event is called, when a new translator is loaded or the system language is changed
-    void changeEvent(QEvent*);
+    void changeEvent(QEvent*) override;
 
-    void showEvent(QShowEvent *event);
+    void showEvent(QShowEvent *event) override;
 protected slots:
     // this slot is called by the language menu actions
     void slotLanguageChanged(QAction *action);
diff --git a/makecolors.h b/makecolors.h
index 51fbe49..7d492a1 100644
--- a/makecolors.h
+++ b/makecolors.h
@@ -20,7 +20,7 @@ class MakeColors : public QThread
 public:
     explicit MakeColors(const QString &nodesTxt, const QString &colorsTxt, const QStringList &searchPaths, QObject *parent);
     explicit MakeColors();
-    ~MakeColors();
+    ~MakeColors() override;
     void startProcess();
     void setFileNodesTxt(const QString &value);
 
@@ -48,7 +48,7 @@ public slots:
     void stopProcess();
 
 protected:
-    void run();
+    void run() override;
 private slots:
     QColor processImage(const QString &path);
     bool parseNodesTxt(const QString &nodesTxt);