diff --git a/isoimagewriter/maindialog.h b/isoimagewriter/maindialog.h
--- a/isoimagewriter/maindialog.h
+++ b/isoimagewriter/maindialog.h
@@ -76,12 +76,12 @@
     void cleanup();
 
     // Reimplemented event handlers for drag&drop support
-    void dragEnterEvent(QDragEnterEvent* event);
-    void dropEvent(QDropEvent* event);
+    void dragEnterEvent(QDragEnterEvent* event) override;
+    void dropEvent(QDropEvent* event) override;
 
     // Reimplemented event handlers for protecting dialog closing during operation
-    void closeEvent(QCloseEvent* event);
-    void keyPressEvent(QKeyEvent* event);
+    void closeEvent(QCloseEvent* event) override;
+    void keyPressEvent(QKeyEvent* event) override;
 
     // Reloads the list of USB flash disks
     void enumFlashDevices();
diff --git a/isoimagewriter/usbdevicemonitor.h b/isoimagewriter/usbdevicemonitor.h
--- a/isoimagewriter/usbdevicemonitor.h
+++ b/isoimagewriter/usbdevicemonitor.h
@@ -40,7 +40,7 @@
     ~UsbDeviceMonitor();
     
     // Implements QAbstractNativeEventFilter interface for processing WM_DEVICECHANGE messages (Windows)
-    bool nativeEventFilter(const QByteArray& eventType, void* message, long* result);
+    bool nativeEventFilter(const QByteArray& eventType, void* message, long* result) override;
 
 protected:
     // Closes handles and frees resources
diff --git a/isoimagewriter/verifyarchiso.h b/isoimagewriter/verifyarchiso.h
--- a/isoimagewriter/verifyarchiso.h
+++ b/isoimagewriter/verifyarchiso.h
@@ -37,8 +37,8 @@
      * Default constructor
      */
     VerifyArchISO(QString filename);
-    bool canVerify();
-    bool isValid();
+    bool canVerify() override;
+    bool isValid() override;
 };
 
 #endif // VERIFYNEONISO_H
diff --git a/isoimagewriter/verifyisoworker.h b/isoimagewriter/verifyisoworker.h
--- a/isoimagewriter/verifyisoworker.h
+++ b/isoimagewriter/verifyisoworker.h
@@ -44,7 +44,7 @@
     void doVerificationNeon();
     void doVerificationKubuntu();
     bool isResultReady();
-    void run();
+    void run() override;
 
 private:
     bool m_result;
diff --git a/isoimagewriter/verifykubuntuiso.h b/isoimagewriter/verifykubuntuiso.h
--- a/isoimagewriter/verifykubuntuiso.h
+++ b/isoimagewriter/verifykubuntuiso.h
@@ -37,8 +37,8 @@
      * Default constructor
      */
     VerifyKubuntuISO(QString filename);
-    bool canVerify();
-    bool isValid();
+    bool canVerify() override;
+    bool isValid() override;
 };
 
 #endif // VERIFYKUBUNTUISO_H
diff --git a/isoimagewriter/verifyneoniso.h b/isoimagewriter/verifyneoniso.h
--- a/isoimagewriter/verifyneoniso.h
+++ b/isoimagewriter/verifyneoniso.h
@@ -37,8 +37,8 @@
      * Default constructor
      */
     VerifyNeonISO(QString filename);
-    bool canVerify();
-    bool isValid();
+    bool canVerify() override;
+    bool isValid() override;
 };
 
 #endif // VERIFYNEONISO_H
diff --git a/isoimagewriter/verifynetrunneriso.h b/isoimagewriter/verifynetrunneriso.h
--- a/isoimagewriter/verifynetrunneriso.h
+++ b/isoimagewriter/verifynetrunneriso.h
@@ -37,8 +37,8 @@
      * Default constructor
      */
     VerifyNetrunnerISO(QString filename);
-    bool canVerify();
-    bool isValid();
+    bool canVerify() override;
+    bool isValid() override;
 };
 
 #endif // VERIFYNETRUNNERISO_H