diff --git a/hecl-gui/ArgumentEditor.hpp b/hecl-gui/ArgumentEditor.hpp
index 3c0eb40f4..27ea7706e 100644
--- a/hecl-gui/ArgumentEditor.hpp
+++ b/hecl-gui/ArgumentEditor.hpp
@@ -18,7 +18,7 @@ class ArgumentEditor : public QDialog {
   QStringListModel m_model;
 public:
   explicit ArgumentEditor(QWidget* parent = nullptr);
-  virtual ~ArgumentEditor();
+  ~ArgumentEditor() override;
 
 private slots:
   void on_addButton_clicked();
diff --git a/hecl-gui/MainWindow.hpp b/hecl-gui/MainWindow.hpp
index f1367e96a..ccad1d904 100644
--- a/hecl-gui/MainWindow.hpp
+++ b/hecl-gui/MainWindow.hpp
@@ -43,9 +43,11 @@ class MainWindow : public QMainWindow {
 
 public:
   explicit MainWindow(QWidget* parent = nullptr);
-  ~MainWindow();
+  ~MainWindow() override;
+
   void setTextTermFormatting(const QString& text);
   void insertContinueNote(const QString& text);
+
 private slots:
   void onExtract();
   void onExtractFinished(int exitCode, QProcess::ExitStatus);
diff --git a/hecl-gui/SysReqTableView.hpp b/hecl-gui/SysReqTableView.hpp
index a8223b38c..6fe3287f4 100644
--- a/hecl-gui/SysReqTableView.hpp
+++ b/hecl-gui/SysReqTableView.hpp
@@ -27,10 +27,10 @@ class SysReqTableModel : public QAbstractTableModel {
 
 public:
   SysReqTableModel(QObject* parent = Q_NULLPTR);
-  int rowCount(const QModelIndex& parent = QModelIndex()) const;
-  int columnCount(const QModelIndex& parent = QModelIndex()) const;
-  QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const;
-  QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
+  int rowCount(const QModelIndex& parent = QModelIndex()) const override;
+  int columnCount(const QModelIndex& parent = QModelIndex()) const override;
+  QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const override;
+  QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
   bool isBlenderVersionOk() const { return m_blendMajor > 2 || (m_blendMajor == 2 && m_blendMinor >= 80); }
   void updateFreeDiskSpace(const QString& path);
 };
@@ -43,7 +43,7 @@ class SysReqTableView : public QTableView {
 
 public:
   SysReqTableView(QWidget* parent = Q_NULLPTR);
-  void paintEvent(QPaintEvent* e) Q_DECL_OVERRIDE;
+  void paintEvent(QPaintEvent* e) override;
   const SysReqTableModel& getModel() const { return m_model; }
   const VectorISATableView& getVectorISATable() const { return m_vectorISATable; }
   bool willRun(const URDEVersion& v) const {
diff --git a/hecl-gui/VectorISATableModel.hpp b/hecl-gui/VectorISATableModel.hpp
index 3f776a794..608329f43 100644
--- a/hecl-gui/VectorISATableModel.hpp
+++ b/hecl-gui/VectorISATableModel.hpp
@@ -10,5 +10,5 @@ protected:
 
 public:
   VectorISATableModel(QObject* parent = Q_NULLPTR) : QAbstractTableModel(parent) {}
-  int rowCount(const QModelIndex& parent = QModelIndex()) const { return 1; }
+  int rowCount(const QModelIndex& parent = QModelIndex()) const override { return 1; }
 };
diff --git a/hecl-gui/VectorISATableModelIntel.hpp b/hecl-gui/VectorISATableModelIntel.hpp
index 1abacc965..d8ce6d791 100644
--- a/hecl-gui/VectorISATableModelIntel.hpp
+++ b/hecl-gui/VectorISATableModelIntel.hpp
@@ -7,9 +7,9 @@ class VectorISATableModelIntel : public VectorISATableModel {
 public:
   VectorISATableModelIntel(QObject* parent = Q_NULLPTR) : VectorISATableModel(parent) {}
 
-  int columnCount(const QModelIndex& parent = QModelIndex()) const { return 7; }
+  int columnCount(const QModelIndex& parent = QModelIndex()) const override { return 7; }
 
-  QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const {
+  QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const override {
     if (role != Qt::DisplayRole && role != Qt::UserRole)
       return {};
 
diff --git a/hecl-gui/VectorISATableView.hpp b/hecl-gui/VectorISATableView.hpp
index 8adeb83c6..5bb4aa30b 100644
--- a/hecl-gui/VectorISATableView.hpp
+++ b/hecl-gui/VectorISATableView.hpp
@@ -19,7 +19,7 @@ class VectorISATableView : public QTableView {
 
 public:
   VectorISATableView(QWidget* parent = Q_NULLPTR);
-  void paintEvent(QPaintEvent* e) Q_DECL_OVERRIDE;
+  void paintEvent(QPaintEvent* e) override;
   VectorISA getISA() const { return m_model.getISA(m_maxISA); }
   bool willRun(VectorISA visa) const { return m_model.willRun(visa); }
 };