diff --git a/src/widgets/BreakpointWidget.cpp b/src/widgets/BreakpointWidget.cpp
index a2f8f64c..3aadf100 100644
--- a/src/widgets/BreakpointWidget.cpp
+++ b/src/widgets/BreakpointWidget.cpp
@@ -127,8 +127,8 @@ BreakpointWidget::BreakpointWidget(MainWindow *main, QAction *action) :
     });
 
     setScrollMode();
-    actionDelBreakpoint = new QAction(tr("Delete breakpoint"));
-    actionToggleBreakpoint = new QAction(tr("Toggle breakpoint"));
+    actionDelBreakpoint = new QAction(tr("Delete breakpoint"), this);
+    actionToggleBreakpoint = new QAction(tr("Toggle breakpoint"), this);
     connect(actionDelBreakpoint, &QAction::triggered, this, &BreakpointWidget::delBreakpoint);
     connect(actionToggleBreakpoint, &QAction::triggered, this, &BreakpointWidget::toggleBreakpoint);
     connect(Core(), &CutterCore::refreshAll, this, &BreakpointWidget::refreshBreakpoint);
diff --git a/src/widgets/DebugActions.cpp b/src/widgets/DebugActions.cpp
index dcbb044c..ee2b6fc1 100644
--- a/src/widgets/DebugActions.cpp
+++ b/src/widgets/DebugActions.cpp
@@ -68,7 +68,7 @@ DebugActions::DebugActions(QToolBar *toolBar, MainWindow *main) :
     QToolButton *startButton = new QToolButton;
     startButton->setPopupMode(QToolButton::MenuButtonPopup);
     connect(startButton, &QToolButton::triggered, startButton, &QToolButton::setDefaultAction);
-    QMenu *startMenu = new QMenu;
+    QMenu *startMenu = new QMenu(startButton);
 
     // only emulation is currently allowed
     // startMenu->addAction(actionStart);
@@ -82,7 +82,7 @@ DebugActions::DebugActions(QToolBar *toolBar, MainWindow *main) :
     continueUntilButton->setPopupMode(QToolButton::MenuButtonPopup);
     connect(continueUntilButton, &QToolButton::triggered, continueUntilButton,
             &QToolButton::setDefaultAction);
-    QMenu *continueUntilMenu = new QMenu;
+    QMenu *continueUntilMenu = new QMenu(continueUntilButton);
     continueUntilMenu->addAction(actionContinueUntilMain);
     continueUntilMenu->addAction(actionContinueUntilCall);
     continueUntilMenu->addAction(actionContinueUntilSyscall);
diff --git a/src/widgets/HexWidget.cpp b/src/widgets/HexWidget.cpp
index dcaaf418..54b810a4 100644
--- a/src/widgets/HexWidget.cpp
+++ b/src/widgets/HexWidget.cpp
@@ -122,7 +122,7 @@ HexWidget::HexWidget(QWidget *parent) :
 
     startAddress = 0ULL;
     cursor.address = 0ULL;
-    data = new MemoryData();
+    data.reset(new MemoryData());
 
     fetchData();
     updateCursorMeta();
diff --git a/src/widgets/HexWidget.h b/src/widgets/HexWidget.h
index afee3b49..cba04641 100644
--- a/src/widgets/HexWidget.h
+++ b/src/widgets/HexWidget.h
@@ -6,6 +6,7 @@
 #include <QScrollArea>
 #include <QTimer>
 #include <QMenu>
+#include <memory>
 
 struct BasicCursor
 {
@@ -457,7 +458,7 @@ private:
     QAction *actionCopyAddress;
     QAction *actionSelectRange;
 
-    AbstractData *data;
+    std::unique_ptr<AbstractData> data;
 };
 
 #endif // HEXWIDGET_H
diff --git a/src/widgets/RegisterRefsWidget.cpp b/src/widgets/RegisterRefsWidget.cpp
index 9c3c437d..a905bca6 100644
--- a/src/widgets/RegisterRefsWidget.cpp
+++ b/src/widgets/RegisterRefsWidget.cpp
@@ -118,8 +118,8 @@ RegisterRefsWidget::RegisterRefsWidget(MainWindow *main, QAction *action) :
     ui->registerRefTreeView->setModel(registerRefProxyModel);
     ui->registerRefTreeView->sortByColumn(RegisterRefModel::RegColumn, Qt::AscendingOrder);
 
-    actionCopyValue = new QAction(tr("Copy register value"));
-    actionCopyRef = new QAction(tr("Copy register reference"));
+    actionCopyValue = new QAction(tr("Copy register value"), this);
+    actionCopyRef = new QAction(tr("Copy register reference"), this);
 
     refreshDeferrer = createRefreshDeferrer([this](){
         refreshRegisterRef();
diff --git a/src/widgets/SectionsWidget.cpp b/src/widgets/SectionsWidget.cpp
index a15b7266..30533aa3 100644
--- a/src/widgets/SectionsWidget.cpp
+++ b/src/widgets/SectionsWidget.cpp
@@ -321,8 +321,8 @@ void SectionsWidget::updateToggle()
 
 AbstractAddrDock::AbstractAddrDock(SectionsModel *model, QWidget *parent) :
     QDockWidget(parent),
-    addrDockScene(new AddrDockScene),
-    graphicsView(new QGraphicsView)
+    addrDockScene(new AddrDockScene(this)),
+    graphicsView(new QGraphicsView(this))
 {
     graphicsView->setScene(addrDockScene);
     setWidget(graphicsView);
diff --git a/src/widgets/StackWidget.cpp b/src/widgets/StackWidget.cpp
index ae61096b..68bb5877 100644
--- a/src/widgets/StackWidget.cpp
+++ b/src/widgets/StackWidget.cpp
@@ -25,8 +25,8 @@ StackWidget::StackWidget(MainWindow *main, QAction *action) :
     viewStack->setHorizontalScrollMode(QAbstractItemView::ScrollPerPixel);
     ui->verticalLayout->addWidget(viewStack);
 
-    seekAction = new QAction(tr("Seek to this offset"));
-    editAction = new QAction(tr("Edit stack value..."));
+    seekAction = new QAction(tr("Seek to this offset"), this);
+    editAction = new QAction(tr("Edit stack value..."), this);
     viewStack->setContextMenuPolicy(Qt::CustomContextMenu);
 
     refreshDeferrer = createRefreshDeferrer([this]() {
diff --git a/src/widgets/VTablesWidget.cpp b/src/widgets/VTablesWidget.cpp
index b15833af..f04d70c2 100644
--- a/src/widgets/VTablesWidget.cpp
+++ b/src/widgets/VTablesWidget.cpp
@@ -138,7 +138,7 @@ VTablesWidget::VTablesWidget(MainWindow *main, QAction *action) :
     tree->addStatusBar(ui->verticalLayout);
 
     model = new VTableModel(&vtables, this);
-    proxy = new VTableSortFilterProxyModel(model);
+    proxy = new VTableSortFilterProxyModel(model, this);
 
     ui->vTableTreeView->setModel(proxy);
     ui->vTableTreeView->sortByColumn(VTableModel::ADDRESS, Qt::AscendingOrder);