diff --git a/iso/iso.cpp b/iso/iso.cpp
--- a/iso/iso.cpp
+++ b/iso/iso.cpp
@@ -191,8 +191,8 @@
     entry.UDS_ENTRY_INSERT(UDSEntry::UDS_ACCESS, isoEntry->permissions() & 07777);   // keep permissions only
 
     if (isoEntry->isFile()) {
-        long long si = ((KIsoFile *)isoEntry)->realsize();
-        if (!si) si = ((KIsoFile *)isoEntry)->size();
+        long long si = (dynamic_cast<const KIsoFile *>(isoEntry))->realsize();
+        if (!si) si = (dynamic_cast<const KIsoFile *>(isoEntry))->size();
         entry.UDS_ENTRY_INSERT(UDSEntry::UDS_SIZE, si);
     } else {
         entry.UDS_ENTRY_INSERT(UDSEntry::UDS_SIZE, 0L);
@@ -202,12 +202,12 @@
     entry.UDS_ENTRY_INSERT(UDSEntry::UDS_GROUP, isoEntry->group());
     entry.UDS_ENTRY_INSERT((uint)UDSEntry::UDS_MODIFICATION_TIME, isoEntry->date().toTime_t());
     entry.UDS_ENTRY_INSERT(UDSEntry::UDS_ACCESS_TIME,
-                 isoEntry->isFile() ? ((KIsoFile *)isoEntry)->adate() :
-                 ((KIsoDirectory *)isoEntry)->adate());
+                 isoEntry->isFile() ? (dynamic_cast<const KIsoFile *>(isoEntry))->adate() :
+                 (dynamic_cast<const KIsoDirectory *>(isoEntry))->adate());
 
     entry.UDS_ENTRY_INSERT(UDSEntry::UDS_CREATION_TIME,
-                 isoEntry->isFile() ? ((KIsoFile *)isoEntry)->cdate() :
-                 ((KIsoDirectory *)isoEntry)->cdate());
+                 isoEntry->isFile() ? (dynamic_cast<const KIsoFile *>(isoEntry))->cdate() :
+                 (dynamic_cast<const KIsoDirectory *>(isoEntry))->cdate());
 
     entry.UDS_ENTRY_INSERT(UDSEntry::UDS_LINK_DEST, isoEntry->symLinkTarget());
 }
@@ -265,7 +265,7 @@
             error(KIO::ERR_IS_FILE, path);
             return;
         }
-        dir = (KArchiveDirectory*)e;
+        dir = dynamic_cast<const KArchiveDirectory*>(e);
     } else {
         dir = root;
     }
diff --git a/krusader/Archive/abstractthreadedjob.cpp b/krusader/Archive/abstractthreadedjob.cpp
--- a/krusader/Archive/abstractthreadedjob.cpp
+++ b/krusader/Archive/abstractthreadedjob.cpp
@@ -72,7 +72,7 @@
 bool AbstractThreadedJob::event(QEvent *e)
 {
     if (e->type() == QEvent::User) {
-        auto *event = (UserEvent*) e;
+        auto *event = dynamic_cast<UserEvent*>( e);
         switch (event->command()) {
         case CMD_SUCCESS: {
             emitResult();
diff --git a/krusader/DiskUsage/diskusage.cpp b/krusader/DiskUsage/diskusage.cpp
--- a/krusader/DiskUsage/diskusage.cpp
+++ b/krusader/DiskUsage/diskusage.cpp
@@ -605,7 +605,7 @@
             deleteNr += del(*it, false, depth + 1);
 
         QString path;
-        for (const Directory *d = (Directory*)file; d != root && d && d->parent() != nullptr; d = d->parent()) {
+        for (const Directory *d = dynamic_cast<Directory*>(file); d != root && d && d->parent() != nullptr; d = d->parent()) {
             if (!path.isEmpty())
                 path = '/' + path;
 
@@ -1097,7 +1097,7 @@
     }
 
     if (e->type() == QEvent::ShortcutOverride) {
-        auto* ke = (QKeyEvent*) e;
+        auto* ke = dynamic_cast<QKeyEvent*>( e);
 
         if (ke->modifiers() == Qt::NoModifier || ke->modifiers() == Qt::KeypadModifier) {
             switch (ke->key()) {
diff --git a/krusader/DiskUsage/dufilelight.cpp b/krusader/DiskUsage/dufilelight.cpp
--- a/krusader/DiskUsage/dufilelight.cpp
+++ b/krusader/DiskUsage/dufilelight.cpp
@@ -124,6 +124,7 @@
             diskUsage->dirUp();
             return;
         } else if (focus && !focus->isFake() && focus->file()->isDir()) {
+            // NOTE: unsafe removable of constness here when casting
             diskUsage->changeDirectory((Directory *)focus->file());
             return;
         }
diff --git a/krusader/DiskUsage/dulines.cpp b/krusader/DiskUsage/dulines.cpp
--- a/krusader/DiskUsage/dulines.cpp
+++ b/krusader/DiskUsage/dulines.cpp
@@ -245,7 +245,7 @@
             int column = columnAt(pos.x());
 
             if (item && column == 1) {
-                File *fileItem = ((DULinesItem *)item)->getFile();
+                File *fileItem = (dynamic_cast<DULinesItem *>(item))->getFile();
                 QToolTip::showText(he->globalPos(), diskUsage->getToolTip(fileItem), this);
                 return true;
             }
@@ -401,7 +401,7 @@
 {
     if (item) {
         if (item->text(0) != "..") {
-            File *fileItem = ((DULinesItem *)item)->getFile();
+            File *fileItem = (dynamic_cast<DULinesItem *>(item))->getFile();
             if (fileItem->isDir())
                 diskUsage->changeDirectory(dynamic_cast<Directory *>(fileItem));
             return true;
@@ -459,7 +459,7 @@
     File * file = nullptr;
 
     if (item && item->text(0) != "..")
-        file = ((DULinesItem *)item)->getFile();
+        file = (dynamic_cast<DULinesItem *>(item))->getFile();
 
     QMenu linesPopup;
     QAction *act = linesPopup.addAction(i18n("Show file sizes"), this, SLOT(slotShowFileSizes()));
@@ -481,7 +481,7 @@
     if (item == nullptr || item->text(0) == "..")
         return nullptr;
 
-    return ((DULinesItem *)item)->getFile();
+    return (dynamic_cast<DULinesItem *>(item))->getFile();
 }
 
 void DULines::slotChanged(File * item)
@@ -492,7 +492,7 @@
         it++;
 
         if (lvitem->text(0) != "..") {
-            auto *duItem = (DULinesItem *)(lvitem);
+            auto *duItem = dynamic_cast<DULinesItem *>(lvitem);
             if (duItem->getFile() == item) {
                 setSortingEnabled(false);
                 duItem->setHidden(item->isExcluded());
@@ -515,7 +515,7 @@
         it++;
 
         if (lvitem->text(0) != "..") {
-            auto *duItem = (DULinesItem *)(lvitem);
+            auto *duItem = dynamic_cast<DULinesItem *>(lvitem);
             if (duItem->getFile() == item) {
                 delete duItem;
                 break;
diff --git a/krusader/DiskUsage/dulistview.cpp b/krusader/DiskUsage/dulistview.cpp
--- a/krusader/DiskUsage/dulistview.cpp
+++ b/krusader/DiskUsage/dulistview.cpp
@@ -167,7 +167,7 @@
     if (item == nullptr || item->text(0) == "..")
         return nullptr;
 
-    return ((DUListViewItem *)item)->getFile();
+    return (dynamic_cast<DUListViewItem *>(item))->getFile();
 }
 
 void DUListView::slotChanged(File * item)
@@ -198,16 +198,16 @@
     File * file = nullptr;
 
     if (item && item->text(0) != "..")
-        file = ((DUListViewItem *)item)->getFile();
+        file = (dynamic_cast<DUListViewItem *>(item))->getFile();
 
     diskUsage->rightClickMenu(pos, file);
 }
 
 bool DUListView::doubleClicked(QTreeWidgetItem * item)
 {
     if (item) {
         if (item->text(0) != "..") {
-            File *fileItem = ((DUListViewItem *)item)->getFile();
+            File *fileItem = (dynamic_cast<DUListViewItem *>(item))->getFile();
             if (fileItem->isDir())
                 diskUsage->changeDirectory(dynamic_cast<Directory *>(fileItem));
             return true;
@@ -265,7 +265,7 @@
         return;
 
     if (item->childCount() == 0) {
-        File *fileItem = ((DUListViewItem *)item)->getFile();
+        File *fileItem = (dynamic_cast<DUListViewItem *>(item))->getFile();
         if (fileItem->isDir())
             addDirectory(dynamic_cast<Directory *>(fileItem), item);
     }
diff --git a/krusader/DiskUsage/radialMap/builder.cpp b/krusader/DiskUsage/radialMap/builder.cpp
--- a/krusader/DiskUsage/radialMap/builder.cpp
+++ b/krusader/DiskUsage/radialMap/builder.cpp
@@ -78,7 +78,7 @@
 
     for (ConstIterator<File> it = dir->constIterator(); it != dir->end(); ++it)
         if ((*it)->isDir() && (*it)->size() > m_minSize)
-            findVisibleDepth((Directory *)*it, depth + 1);   //if no files greater than min size the depth is still recorded
+            findVisibleDepth(dynamic_cast<const Directory *>(*it), depth + 1);   //if no files greater than min size the depth is still recorded
 }
 
 void
@@ -117,7 +117,7 @@
             if ((*it)->isDir()) {
                 if (depth != *m_depth) {
                     //recurse
-                    s->m_hasHiddenChildren = build((Directory*) * it, depth + 1, a_start, a_start + a_len);
+                    s->m_hasHiddenChildren = build(dynamic_cast<const Directory *>(*it), depth + 1, a_start, a_start + a_len);
                 } else s->m_hasHiddenChildren = true;
             }
 
diff --git a/krusader/DiskUsage/radialMap/labels.cpp b/krusader/DiskUsage/radialMap/labels.cpp
--- a/krusader/DiskUsage/radialMap/labels.cpp
+++ b/krusader/DiskUsage/radialMap/labels.cpp
@@ -111,7 +111,7 @@
         if (m_focus->file() == nullptr || !m_focus->file()->isDir()) return;
 
         //find the range of levels we will be potentially drawing labels for
-        for (const auto *p = (const Directory *)m_focus->file();
+        for (const auto *p = dynamic_cast<const Directory *>(m_focus->file());
                 p != m_tree;
                 ++startLevel) { //startLevel is the level above whatever m_focus is in
             p = p->parent();
diff --git a/krusader/DiskUsage/radialMap/widgetEvents.cpp b/krusader/DiskUsage/radialMap/widgetEvents.cpp
--- a/krusader/DiskUsage/radialMap/widgetEvents.cpp
+++ b/krusader/DiskUsage/radialMap/widgetEvents.cpp
@@ -235,7 +235,7 @@
 #endif
                 emit activated(url);   //activate first, this will cause UI to prepare itself
                 if (m_focus)
-                    createFromCache((Directory *)m_focus->file());
+                    createFromCache(dynamic_cast<const Directory*>(m_focus->file()));
             }
         }
     }
diff --git a/krusader/GUI/krhistorycombobox.cpp b/krusader/GUI/krhistorycombobox.cpp
--- a/krusader/GUI/krhistorycombobox.cpp
+++ b/krusader/GUI/krhistorycombobox.cpp
@@ -48,7 +48,7 @@
 bool KHBoxEventFilter::eventFilter(QObject *obj, QEvent *event)
 {
     if (event->type() == QEvent::KeyPress) {
-        auto keyEvent = static_cast<QKeyEvent *>(event);
+        auto keyEvent = dynamic_cast<QKeyEvent *>(event);
         if (keyEvent->modifiers() == Qt::ShiftModifier && keyEvent->key() == Qt::Key::Key_Delete) {
             auto comboBox = dynamic_cast<KHistoryComboBox *>(obj);
             if (comboBox != nullptr) {
@@ -83,7 +83,7 @@
 bool KHBoxListEventFilter::eventFilter(QObject *obj, QEvent *event)
 {
     if (event->type() == QEvent::KeyPress) {
-        auto keyEvent = static_cast<QKeyEvent *>(event);
+        auto keyEvent = dynamic_cast<QKeyEvent *>(event);
         if (keyEvent->modifiers() == Qt::ShiftModifier && keyEvent->key() == Qt::Key::Key_Delete) {
             auto itemView = dynamic_cast<QAbstractItemView *>(obj);
             if (itemView->model() != nullptr) {
diff --git a/krusader/GUI/krtreewidget.cpp b/krusader/GUI/krtreewidget.cpp
--- a/krusader/GUI/krtreewidget.cpp
+++ b/krusader/GUI/krtreewidget.cpp
@@ -48,7 +48,7 @@
     switch (event->type()) {
         // HACK: QT 4 Context menu key isn't handled properly
     case QEvent::ContextMenu: {
-        auto* ce = (QContextMenuEvent*) event;
+        auto* ce = dynamic_cast<QContextMenuEvent*>( event);
 
         if (ce->reason() == QContextMenuEvent::Mouse) {
             QPoint pos = viewport()->mapFromGlobal(ce->globalPos());
@@ -72,7 +72,7 @@
     case QEvent::KeyPress: {
         // HACK: QT 4 Ctrl+A bug fix: Ctrl+A doesn't work if QTreeWidget contains parent / child items
         //       Insert doesn't change the selections for multi selection modes
-        auto* ke = (QKeyEvent*) event;
+        auto* ke = dynamic_cast<QKeyEvent*>( event);
         switch (ke->key()) {
         case Qt::Key_Insert: {
             if (ke->modifiers() != 0)
@@ -110,7 +110,7 @@
     }
     break;
     case QEvent::Resize: {
-        auto * re = (QResizeEvent *)event;
+        auto * re = dynamic_cast<QResizeEvent *>(event);
         if (!_inResize && re->oldSize() != re->size()) {
             if (_stretchingColumn != -1 && columnCount()) {
                 QList< int > columnsSizes;
diff --git a/krusader/GUI/terminaldock.cpp b/krusader/GUI/terminaldock.cpp
--- a/krusader/GUI/terminaldock.cpp
+++ b/krusader/GUI/terminaldock.cpp
@@ -228,7 +228,7 @@
 
     switch (e->type()) {
     case QEvent::ShortcutOverride: {
-        auto *ke = (QKeyEvent *)e;
+        auto *ke = dynamic_cast<QKeyEvent *>(e);
         // If not present, some keys would be considered a shortcut, for example "a"
         if ((ke->key() ==  Qt::Key_Insert) && (ke->modifiers()  == Qt::ShiftModifier)) {
             ke->accept();
@@ -242,7 +242,7 @@
         break;
     }
     case QEvent::KeyPress: {
-        auto *ke = (QKeyEvent *)e;
+        auto *ke = dynamic_cast<QKeyEvent *>(e);
         if (applyShortcuts(ke)) {
             ke->accept();
             return true;
diff --git a/krusader/KViewer/krviewer.cpp b/krusader/KViewer/krviewer.cpp
--- a/krusader/KViewer/krviewer.cpp
+++ b/krusader/KViewer/krviewer.cpp
@@ -242,7 +242,7 @@
     // Should look into if there is any way to fix it. Currently if a KPart has same shortcut as KrViewer then
     // it causes a conflict, messagebox shown to user and no action triggered.
     if (e->type() == QEvent::ShortcutOverride) {
-        auto* ke = (QKeyEvent*) e;
+        auto* ke = dynamic_cast<QKeyEvent*>( e);
         if (reservedKeys.contains(ke->key())) {
             ke->accept();
 
@@ -259,7 +259,7 @@
             return true;
         }
     } else if (e->type() == QEvent::KeyPress) {
-        auto* ke = (QKeyEvent*) e;
+        auto* ke = dynamic_cast<QKeyEvent*>( e);
         if (reservedKeys.contains(ke->key())) {
             ke->accept();
             return true;
diff --git a/krusader/KViewer/lister.cpp b/krusader/KViewer/lister.cpp
--- a/krusader/KViewer/lister.cpp
+++ b/krusader/KViewer/lister.cpp
@@ -1360,7 +1360,7 @@
         connect(downloadJob, &KIO::TransferJob::result, this, [=](KJob *job) {
             _tempFile->flush();
             if (job->error()) {   /* any error occurred? */
-                auto *kioJob = (KIO::TransferJob *)job;
+                auto *kioJob = dynamic_cast<KIO::TransferJob *>(job);
                 KMessageBox::error(_textArea, i18n("Error reading file %1.", kioJob->url().toDisplayString(QUrl::PreferLocalFile)));
             }
             _downloading = false;
diff --git a/krusader/Konfigurator/kgdependencies.cpp b/krusader/Konfigurator/kgdependencies.cpp
--- a/krusader/Konfigurator/kgdependencies.cpp
+++ b/krusader/Konfigurator/kgdependencies.cpp
@@ -145,7 +145,7 @@
 
 void KgDependencies::slotApply(QObject *obj, const QString& configGroup, const QString& name)
 {
-    auto *urlRequester = (KonfiguratorURLRequester *) obj;
+    auto *urlRequester = dynamic_cast<KonfiguratorURLRequester *>( obj);
 
     KConfigGroup group(krConfig, configGroup);
     group.writeEntry(name, urlRequester->url().toDisplayString(QUrl::PreferLocalFile));
diff --git a/krusader/Konfigurator/kggeneral.cpp b/krusader/Konfigurator/kggeneral.cpp
--- a/krusader/Konfigurator/kggeneral.cpp
+++ b/krusader/Konfigurator/kggeneral.cpp
@@ -287,7 +287,7 @@
 
 void KgGeneral::applyTempDir(QObject *obj, const QString& configGroup, const QString& name)
 {
-    auto *urlReq = (KonfiguratorURLRequester *)obj;
+    auto *urlReq = dynamic_cast<KonfiguratorURLRequester *>(obj);
     QString value = urlReq->url().toDisplayString(QUrl::PreferLocalFile);
 
     KConfigGroup(krConfig, configGroup).writeEntry(name, value);
diff --git a/krusader/Konfigurator/konfigurator.cpp b/krusader/Konfigurator/konfigurator.cpp
--- a/krusader/Konfigurator/konfigurator.cpp
+++ b/krusader/Konfigurator/konfigurator.cpp
@@ -163,7 +163,7 @@
 void Konfigurator::slotApplyEnable()
 {
     lastPage = currentPage();
-    bool isChanged = ((KonfiguratorPage *)(lastPage->widget()))->isChanged();
+    bool isChanged = (dynamic_cast<KonfiguratorPage *>(lastPage->widget()))->isChanged();
     button(QDialogButtonBox::Apply)->setEnabled(isChanged);
     button(QDialogButtonBox::Reset)->setEnabled(isChanged);
 }
@@ -173,7 +173,7 @@
     if (before == nullptr)
         return true;
 
-    auto *currentPg = (KonfiguratorPage *)(before->widget());
+    auto *currentPg = dynamic_cast<KonfiguratorPage *>(before->widget());
 
     if (internalCall) {
         internalCall = false;
@@ -221,17 +221,17 @@
 
 void Konfigurator::slotApply()
 {
-    emit configChanged(((KonfiguratorPage*)(currentPage()->widget()))->apply());
+    emit configChanged((dynamic_cast<KonfiguratorPage*>(currentPage()->widget()))->apply());
 }
 
 void Konfigurator::slotReset()
 {
-    ((KonfiguratorPage *)(currentPage()->widget()))->loadInitialValues();
+    (dynamic_cast<KonfiguratorPage *>(currentPage()->widget()))->loadInitialValues();
 }
 
 void Konfigurator::slotRestoreDefaults()
 {
-    ((KonfiguratorPage *)(currentPage()->widget()))->setDefaults();
+    (dynamic_cast<KonfiguratorPage *>(currentPage()->widget()))->setDefaults();
 }
 
 void Konfigurator::slotShowHelp()
diff --git a/krusader/Panel/PanelView/krinterbriefview.cpp b/krusader/Panel/PanelView/krinterbriefview.cpp
--- a/krusader/Panel/PanelView/krinterbriefview.cpp
+++ b/krusader/Panel/PanelView/krinterbriefview.cpp
@@ -236,7 +236,7 @@
 {
     if (object == _header) {
         if (event->type() == QEvent::ContextMenu) {
-            auto *me = (QContextMenuEvent *)event;
+            auto *me = dynamic_cast<QContextMenuEvent *>(event);
             showContextMenu(me->globalPos());
             return true;
         }
diff --git a/krusader/Panel/PanelView/krinterdetailedview.cpp b/krusader/Panel/PanelView/krinterdetailedview.cpp
--- a/krusader/Panel/PanelView/krinterdetailedview.cpp
+++ b/krusader/Panel/PanelView/krinterdetailedview.cpp
@@ -271,7 +271,7 @@
 {
     if (object == header()) {
         if (event->type() == QEvent::ContextMenu) {
-            auto *me = (QContextMenuEvent *)event;
+            auto *me = dynamic_cast<QContextMenuEvent *>(event);
             showContextMenu(me->globalPos());
             return true;
         } else if (event->type() == QEvent::Resize) {
diff --git a/krusader/Panel/krsearchbar.cpp b/krusader/Panel/krsearchbar.cpp
--- a/krusader/Panel/krsearchbar.cpp
+++ b/krusader/Panel/krsearchbar.cpp
@@ -222,7 +222,7 @@
 
     qDebug() << "key press event=" << event;
 
-    auto *ke = static_cast<QKeyEvent *>(event);
+    auto *ke = dynamic_cast<QKeyEvent *>(event);
     auto modifiers = ke->modifiers();
 
     if (watched == _view->widget()) {
diff --git a/krusader/Search/krsearchdialog.cpp b/krusader/Search/krsearchdialog.cpp
--- a/krusader/Search/krsearchdialog.cpp
+++ b/krusader/Search/krsearchdialog.cpp
@@ -188,7 +188,7 @@
     searcherTabs = new QTabWidget(this);
 
     filterTabs = FilterTabs::addTo(searcherTabs, FilterTabs::Default);
-    generalFilter = (GeneralFilter *)filterTabs->get("GeneralFilter");
+    generalFilter = dynamic_cast<GeneralFilter *>(filterTabs->get("GeneralFilter"));
 
 
     // creating the result tab
diff --git a/krusader/Synchronizer/feedtolistboxdialog.cpp b/krusader/Synchronizer/feedtolistboxdialog.cpp
--- a/krusader/Synchronizer/feedtolistboxdialog.cpp
+++ b/krusader/Synchronizer/feedtolistboxdialog.cpp
@@ -63,7 +63,7 @@
 
     QTreeWidgetItemIterator it(syncList);
     while (*it) {
-        auto *item = (SynchronizerGUI::SyncViewItem *) * it;
+        auto *item = dynamic_cast<SynchronizerGUI::SyncViewItem *>( * it);
         SynchronizerFileItem *syncItem = item->synchronizerItemRef();
 
         if (syncItem && syncItem->isMarked()) {
@@ -169,7 +169,7 @@
 
     QTreeWidgetItemIterator it(syncList);
     for (;*it; it++) {
-        auto *item = (SynchronizerGUI::SyncViewItem *) * it;
+        auto *item = dynamic_cast<SynchronizerGUI::SyncViewItem *>( * it);
         SynchronizerFileItem *syncItem = item->synchronizerItemRef();
 
         if (!syncItem || !syncItem->isMarked())
diff --git a/krusader/Synchronizer/synchronizer.cpp b/krusader/Synchronizer/synchronizer.cpp
--- a/krusader/Synchronizer/synchronizer.cpp
+++ b/krusader/Synchronizer/synchronizer.cpp
@@ -179,7 +179,7 @@
 
             if (entry->inherits("CompareTask")) {
                 if (entry->state() == ST_STATE_READY) {
-                    auto *ctentry = (CompareTask *) entry;
+                    auto *ctentry = dynamic_cast<CompareTask *>( entry);
                     if (ctentry->isDuplicate())
                         compareDirectory(ctentry->parent(), ctentry->leftDirList(), ctentry->rightDirList(),
                                          ctentry->leftDir(), ctentry->rightDir());
diff --git a/krusader/Synchronizer/synchronizergui.cpp b/krusader/Synchronizer/synchronizergui.cpp
--- a/krusader/Synchronizer/synchronizergui.cpp
+++ b/krusader/Synchronizer/synchronizergui.cpp
@@ -386,7 +386,7 @@
     synchGrid->addWidget(synchronizerTabs, 0, 0);
 
     filterTabs = FilterTabs::addTo(synchronizerTabs, FilterTabs::HasDontSearchIn);
-    generalFilter = (GeneralFilter *)filterTabs->get("GeneralFilter");
+    generalFilter = dynamic_cast<GeneralFilter *>(filterTabs->get("GeneralFilter"));
     generalFilter->searchFor->setEditText(fileFilter->currentText());
     generalFilter->searchForCase->setChecked(true);
 
@@ -669,7 +669,7 @@
     if (!itemIn)
         return;
 
-    auto *syncItem = (SyncViewItem *)itemIn;
+    auto *syncItem = dynamic_cast<SyncViewItem *>(itemIn);
     SynchronizerFileItem *item = syncItem->synchronizerItemRef();
     if (item && item->existsInLeft() && item->existsInRight() && !item->isDir()) {
         QString leftDirName     = item->leftDirectory().isEmpty() ? "" : item->leftDirectory() + '/';
@@ -705,7 +705,7 @@
     if (!itemIn)
         return;
 
-    auto *syncItem = (SyncViewItem *)itemIn;
+    auto *syncItem = dynamic_cast<SyncViewItem *>(itemIn);
     if (syncItem == nullptr)
         return;
 
@@ -1267,7 +1267,7 @@
 
         bool isedit = e->key() == Qt::Key_F4;
 
-        SynchronizerFileItem *item = ((SyncViewItem *)listItem)->synchronizerItemRef();
+        SynchronizerFileItem *item = (dynamic_cast<SyncViewItem *>(listItem))->synchronizerItemRef();
         QString leftDirName = item->leftDirectory().isEmpty() ? "" : item->leftDirectory() + '/';
         QString rightDirName = item->rightDirectory().isEmpty() ? "" : item->rightDirectory() + '/';
 
@@ -1321,7 +1321,7 @@
 bool SynchronizerGUI::eventFilter(QObject * /* watched */, QEvent * e)
 {
     if (e->type() == QEvent::KeyPress) {
-        auto* ke = (QKeyEvent*) e;
+        auto* ke = dynamic_cast<QKeyEvent*>( e);
         switch (ke->key()) {
         case Qt::Key_Down:
         case Qt::Key_Left:
@@ -1363,7 +1363,7 @@
             if (listItem == nullptr)
                 return true;
 
-            SynchronizerFileItem *item = ((SyncViewItem *)listItem)->synchronizerItemRef();
+            SynchronizerFileItem *item = (dynamic_cast<SyncViewItem *>(listItem))->synchronizerItemRef();
 
             bool hasSelected = false;
             QList<QTreeWidgetItem *> selected = syncList->selectedItems();
diff --git a/krusader/Synchronizer/synchronizertask.cpp b/krusader/Synchronizer/synchronizertask.cpp
--- a/krusader/Synchronizer/synchronizertask.cpp
+++ b/krusader/Synchronizer/synchronizertask.cpp
@@ -272,8 +272,8 @@
         if (compareArray.size())
             abortContentComparing();
     } else {
-        if (!((KIO::TransferJob *)job)->isSuspended()) {
-            ((KIO::TransferJob *)job)->suspend();
+        if (!(dynamic_cast<KIO::TransferJob *>(job))->isSuspended()) {
+            (dynamic_cast<KIO::TransferJob *>(job))->suspend();
             otherJob->resume();
         }
     }
diff --git a/krusader/actionsbase.cpp b/krusader/actionsbase.cpp
--- a/krusader/actionsbase.cpp
+++ b/krusader/actionsbase.cpp
@@ -98,13 +98,13 @@
 KToggleAction *ActionsBase::toggleAction(QString text, QString icon, const QKeySequence& shortcut,
                                 QObject *recv, const char *slot, QString name)
 {
-    return (KToggleAction *)(action(std::move(text), std::move(icon), shortcut, recv, slot, std::move(name), true));
+    return dynamic_cast<KToggleAction *>(action(std::move(text), std::move(icon), shortcut, recv, slot, std::move(name), true));
 }
 
 KToggleAction *ActionsBase::toggleAction(QString text, QString icon, const QKeySequence& shortcut,
                                          ActionGroup &group, const char *slot, QString name)
 {
-    return (KToggleAction *)(action(std::move(text), std::move(icon), shortcut, group, slot, std::move(name), true));
+    return dynamic_cast<KToggleAction *>(action(std::move(text), std::move(icon), shortcut, group, slot, std::move(name), true));
 }
 
 QAction *ActionsBase::stdAction(KStandardAction::StandardAction id, QObject *recv, const char *slot)
diff --git a/krusader/krusader.cpp b/krusader/krusader.cpp
--- a/krusader/krusader.cpp
+++ b/krusader/krusader.cpp
@@ -540,7 +540,7 @@
 }
 
 void Krusader::updateUserActions() {
-    auto *userActionMenu = (KActionMenu *) KrActions::actUserMenu;
+    auto *userActionMenu = dynamic_cast<KActionMenu *>( KrActions::actUserMenu);
     if (userActionMenu) {
         userActionMenu->menu()->clear();