diff --git a/liteidex/src/plugins/golangpackage/gotool.cpp b/liteidex/src/plugins/golangpackage/gotool.cpp
index 8c012e7fd..ff4d8eb44 100644
--- a/liteidex/src/plugins/golangpackage/gotool.cpp
+++ b/liteidex/src/plugins/golangpackage/gotool.cpp
@@ -45,8 +45,13 @@ GoTool::GoTool(LiteApi::IApplication *app, QObject *parent) :
     m_process = new Process(this);
     connect(m_process,SIGNAL(readyReadStandardError()),this,SLOT(readError()));
     connect(m_process,SIGNAL(readyReadStandardOutput()),this,SLOT(readOutput()));
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    connect(m_process, &QProcess::errorOccurred, this, &GoTool::error);
+    connect(m_process, &QProcess::finished, this, &GoTool::finished);
+#else
     connect(m_process,SIGNAL(errorOccurred(QProcess::ProcessError)),this,SIGNAL(error(QProcess::ProcessError)));
     connect(m_process,SIGNAL(finished(int,QProcess::ExitStatus)),this,SIGNAL(finished(int,QProcess::ExitStatus)));
+#endif
 }
 
 GoTool::~GoTool()
diff --git a/liteidex/src/plugins/golangpackage/packagebrowser.cpp b/liteidex/src/plugins/golangpackage/packagebrowser.cpp
index 4c10ed5af..1bdf34b1a 100644
--- a/liteidex/src/plugins/golangpackage/packagebrowser.cpp
+++ b/liteidex/src/plugins/golangpackage/packagebrowser.cpp
@@ -119,7 +119,11 @@ PackageBrowser::PackageBrowser(LiteApi::IApplication *app, QObject *parent) :
     m_toolWindowAct = m_liteApp->toolWindowManager()->addToolWindow(Qt::LeftDockWidgetArea,m_widget,"GoPackageBrowser",tr("Go Package Browser"),true);
     connect(m_toolWindowAct,SIGNAL(triggered(bool)),this,SLOT(toggledToolWindow(bool)));
     connect(m_goTool,SIGNAL(finished(int,QProcess::ExitStatus)),this,SLOT(finished(int,QProcess::ExitStatus)));
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    connect(m_goTool, &GoTool::error, this, &PackageBrowser::error);
+#else
     connect(m_goTool,SIGNAL(error(QProcess::ProcessError)),this,SLOT(error(QProcess::ProcessError)));
+#endif
     connect(m_treeView,SIGNAL(customContextMenuRequested(QPoint)),this,SLOT(customContextMenuRequested(QPoint)));
     connect(m_treeView,SIGNAL(doubleClicked(QModelIndex)),this,SLOT(doubleClicked()));
     connect(m_treeView,SIGNAL(enterKeyPressed(QModelIndex)),this,SLOT(enterKeyPressed(QModelIndex)));
diff --git a/liteidex/src/utils/vterm/vtermwidget.cpp b/liteidex/src/utils/vterm/vtermwidget.cpp
index d81735c77..271bca9e2 100644
--- a/liteidex/src/utils/vterm/vtermwidget.cpp
+++ b/liteidex/src/utils/vterm/vtermwidget.cpp
@@ -183,6 +183,16 @@ void VTermWidget::keyPressEvent(QKeyEvent *e)
         return;
     }
     if ((e->modifiers() & TermControlModifier) ) {
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+        // Qt key codes for special keys (arrows, function keys, ...) are
+        // outside the UTF-16 range and must not be converted to QChar.
+        const int key = e->key();
+        if (key >= Qt::Key_A && key <= Qt::Key_Underscore) {
+            QByteArray array(1, char(key - Qt::Key_A + 1));
+            m_process->write(array);
+            return;
+        }
+#else
         QChar c(e->key());
         char asciiVal = c.toUpper().toLatin1();
         QByteArray array;
@@ -191,6 +201,7 @@ void VTermWidget::keyPressEvent(QKeyEvent *e)
             m_process->write(array);
             return;
         }
+#endif
     }
     VTermWidgetBase::keyPressEvent(e);
 }
diff --git a/liteidex/src/utils/vterm/vtermwidgetbase.cpp b/liteidex/src/utils/vterm/vtermwidgetbase.cpp
index bb3a52a2f..27ea4fe64 100644
--- a/liteidex/src/utils/vterm/vtermwidgetbase.cpp
+++ b/liteidex/src/utils/vterm/vtermwidgetbase.cpp
@@ -58,6 +58,21 @@ bool attrs_is_equal(VTermScreenCellAttrs *a, VTermScreenCellAttrs *b)
     return  a->bold == b->bold && a->italic == b->italic && a->strike == b->strike && a->underline == b->underline;
 }
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+static bool is_valid_cell_char(const VTermScreenCell &cell)
+{
+    if (cell.chars[0] == 0 || cell.chars[0] == static_cast<uint32_t>(-1)) {
+        return false;
+    }
+    for (int i = 0; i < VTERM_MAX_CHARS_PER_CELL && cell.chars[i]; ++i) {
+        if (cell.chars[i] == static_cast<uint32_t>(-1) || cell.chars[i] > 0x10ffff) {
+            return false;
+        }
+    }
+    return true;
+}
+#endif
+
 
 int vterm_damage(VTermRect rect, void *user)
 {
@@ -889,18 +904,30 @@ void VTermWidgetBase::setSelectionUnderWord(int row, int col)
     }
     VTermScreenCell cell;
     this->adjustFetchCell(row,&col,&cell);
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+    if (!is_valid_cell_char(cell)) {
+#else
     if (!cell.chars[0]) {
+#endif
         int ncol = col+1;
         for (; ncol < m_cols; ++ncol) {
             this->fetchCell(row,ncol,&cell);
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+            if (is_valid_cell_char(cell)) {
+#else
             if (cell.chars[0]) {
+#endif
                 break;
             }
         }
         int pcol = col-1;
         for (;pcol >= 0;--pcol) {
             this->fetchCell(row,pcol,&cell);
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+            if (is_valid_cell_char(cell)) {
+#else
             if (cell.chars[0]) {
+#endif
                 break;
             }
         }
@@ -911,7 +938,11 @@ void VTermWidgetBase::setSelectionUnderWord(int row, int col)
         int ncol = col+width;
         for (; ncol < m_cols;) {
             this->fetchCell(row,ncol,&cell);
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+            if (!is_valid_cell_char(cell)) {
+#else
             if (!cell.chars[0]) {
+#endif
                 break;
             }
             QChar c = QString::fromUcs4(cell.chars)[0];
@@ -925,7 +956,11 @@ void VTermWidgetBase::setSelectionUnderWord(int row, int col)
         int pcol = col-1;
         for (; pcol >= 0;--pcol) {
             this->adjustFetchCell(row,&pcol,&cell);
+#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
+            if (!is_valid_cell_char(cell)) {
+#else
             if (!cell.chars[0]) {
+#endif
                 break;
             }
             QChar c = QString::fromUcs4(cell.chars)[0];