diff --git a/libs/vtextedit b/libs/vtextedit
index 7fc093c1..6fe9338d 160000
--- a/libs/vtextedit
+++ b/libs/vtextedit
@@ -1 +1 @@
-Subproject commit 7fc093c14e8bc4b8f9203f81499ddd993b707906
+Subproject commit 6fe9338d459b016877ebc2d65819e8171ab03659
diff --git a/src/src.pro b/src/src.pro
index e3e1dd1f..24548eb1 100644
--- a/src/src.pro
+++ b/src/src.pro
@@ -2,9 +2,13 @@ lessThan(QT_MAJOR_VERSION, 5): error("requires Qt 5 and above")
 
 equals(QT_MAJOR_VERSION, 5):lessThan(QT_MINOR_VERSION, 12): error("requires Qt 5.12 and above")
 
-QT += core gui widgets webenginewidgets webchannel network svg printsupport core5compat
+QT += core gui widgets webenginewidgets webchannel network svg printsupport
 QT += sql
 
+greaterThan(QT_MAJOR_VERSION, 5) {
+    QT += core5compat
+}
+
 CONFIG -= qtquickcompiler
 
 unix:!mac:exists(/usr/bin/ld.gold) {
diff --git a/src/utils/utils.cpp b/src/utils/utils.cpp
index c93e5ded..97a875ed 100644
--- a/src/utils/utils.cpp
+++ b/src/utils/utils.cpp
@@ -70,7 +70,12 @@ QChar Utils::keyToChar(int p_key, bool p_lowerCase)
 
 QString Utils::pickAvailableFontFamily(const QStringList &p_families)
 {
+#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
+    auto availableFonts = QFontDatabase().families();
+#else
     auto availableFonts = QFontDatabase::families();
+#endif
+
     for (const auto& f : p_families) {
         auto family = f.trimmed();
         if (family.isEmpty()) {
diff --git a/src/utils/utils.pri b/src/utils/utils.pri
index b53ebf30..e0081702 100644
--- a/src/utils/utils.pri
+++ b/src/utils/utils.pri
@@ -1,4 +1,8 @@
-QT += widgets svg core5compat
+QT += widgets svg
+
+greaterThan(QT_MAJOR_VERSION, 5) {
+    QT += core5compat
+}
 
 SOURCES += \
     $$PWD/asyncworker.cpp \
diff --git a/src/widgets/editors/markdownviewer.cpp b/src/widgets/editors/markdownviewer.cpp
index 0208e3a3..aca4c2e8 100644
--- a/src/widgets/editors/markdownviewer.cpp
+++ b/src/widgets/editors/markdownviewer.cpp
@@ -108,7 +108,12 @@ void MarkdownViewer::setPreviewHelper(PreviewHelper *p_previewHelper)
 
 void MarkdownViewer::contextMenuEvent(QContextMenuEvent *p_event)
 {
+#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
+    QScopedPointer<QMenu> menu(page()->createStandardContextMenu());
+#else
     QScopedPointer<QMenu> menu(createStandardContextMenu());
+#endif
+
     const QList<QAction *> actions = menu->actions();
 
 #if defined(Q_OS_WIN)
diff --git a/src/widgets/markdownviewwindow.cpp b/src/widgets/markdownviewwindow.cpp
index 0c352c9d..7f53ae9b 100644
--- a/src/widgets/markdownviewwindow.cpp
+++ b/src/widgets/markdownviewwindow.cpp
@@ -395,9 +395,11 @@ void MarkdownViewWindow::setupTextEditor()
 
     connect(m_editor, &MarkdownEditor::applySnippetRequested,
             this, QOverload<>::of(&MarkdownViewWindow::applySnippet));
+
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     connect(m_viewer, &MarkdownViewer::printFinished,
             this, &MarkdownViewWindow::onPrintFinished);
-
+#endif
 }
 
 QStackedWidget *MarkdownViewWindow::getMainStatusWidget() const
@@ -1407,8 +1409,12 @@ void MarkdownViewWindow::print()
     m_printer = PrintUtils::promptForPrint(m_viewer->hasSelection(), this);
     if (m_printer)
     {
+#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
+        m_viewer->page()->print(m_printer.data(), std::bind(&MarkdownViewWindow::onPrintFinished, this, std::placeholders::_1));
+#else
         m_printer->setOutputFormat(QPrinter::PdfFormat);
         m_viewer->print(m_printer.get());
+#endif
     }
 }
 
diff --git a/src/widgets/titlebar.cpp b/src/widgets/titlebar.cpp
index 124e7ff0..90813717 100644
--- a/src/widgets/titlebar.cpp
+++ b/src/widgets/titlebar.cpp
@@ -99,7 +99,11 @@ void TitleBar::setupActionButtons(TitleBar::Actions p_actionFlags)
     }
 }
 
+#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
+void TitleBar::enterEvent(QEvent *p_event)
+#else
 void TitleBar::enterEvent(QEnterEvent *p_event)
+#endif
 {
     QFrame::enterEvent(p_event);
     setActionButtonsVisible(true);
diff --git a/src/widgets/titlebar.h b/src/widgets/titlebar.h
index 258f6baf..fd6ff83b 100644
--- a/src/widgets/titlebar.h
+++ b/src/widgets/titlebar.h
@@ -53,7 +53,11 @@ namespace vnotex
         void setActionButtonsAlwaysShown(bool p_shown);
 
     protected:
+#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
+        void enterEvent(QEvent *p_event) Q_DECL_OVERRIDE;
+#else
         void enterEvent(QEnterEvent *p_event) Q_DECL_OVERRIDE;
+#endif
 
         void leaveEvent(QEvent *p_event) Q_DECL_OVERRIDE;