diff --git a/QTextEditEnhanced.py b/QTextEditEnhanced.py
index f89c142..3c459dd 100644
--- a/QTextEditEnhanced.py
+++ b/QTextEditEnhanced.py
@@ -1,8 +1,7 @@
 import sys
-from qgis.PyQt.QtWidgets import QTextEdit, QDialog, QToolTip
-from qgis.PyQt.QtCore import QEvent
-from qgis.PyQt.QtGui import QTextCursor
-from qgis.PyQt.Qt import QDesktopServices, QUrl, QApplication, Qt, QBrush, QTextCharFormat
+from qgis.PyQt.QtWidgets import QTextEdit, QDialog, QToolTip, QApplication
+from qgis.PyQt.QtCore import QEvent, Qt, QUrl
+from qgis.PyQt.QtGui import QTextCursor, QDesktopServices, QBrush, QTextCharFormat
 from qgis.PyQt import uic
 from os import path
 
@@ -16,12 +15,12 @@ def __init__(self, parent):
         self.link_window = uic.loadUi(path.join(pluginPath, "ui/ui_hyperlink.ui"))
 
     def event(self, e):
-        if e.type() == QEvent.ToolTip:
+        if e.type() == QEvent.Type.ToolTip:
             pos = e.pos()
             pos.setX(pos.x() - self.viewportMargins().left())
             pos.setY(pos.y() - self.viewportMargins().top())
             cursor = self.cursorForPosition(pos)
-            cursor.select(QTextCursor.WordUnderCursor)
+            cursor.select(QTextCursor.SelectionType.WordUnderCursor)
             text = self.anchorAt(e.pos())
             if text:
                 QToolTip.showText(e.globalPos(), f"{text} [Ctrl + click]" )
@@ -32,7 +31,7 @@ def event(self, e):
 
     def mouseMoveEvent(self, e): 
         if self.anchorAt(e.pos()):
-            QApplication.setOverrideCursor(Qt.PointingHandCursor)
+            QApplication.setOverrideCursor(Qt.CursorShape.PointingHandCursor)
         else:
             self.restoreDefaultCursor()
         super().mouseMoveEvent(e)
@@ -42,7 +41,7 @@ def leaveEvent(self, e):
         self.restoreDefaultCursor()
 
     def mousePressEvent(self, e):
-        if e.button() == Qt.RightButton:
+        if e.button() == Qt.MouseButton.RightButton:
             menu = self.createStandardContextMenu()
             menu.addSeparator()
             addHyperLinkAction = menu.addAction("Add Hyperlink")
@@ -52,7 +51,7 @@ def mousePressEvent(self, e):
         super().mousePressEvent(e)
 
     def mouseReleaseEvent(self, e):
-        if e.modifiers() == Qt.ControlModifier:
+        if e.modifiers() == Qt.Modifier.CTRL:
             url = QUrl.fromLocalFile(self.anchorAt(e.pos()))
             QDesktopServices.openUrl(url)
         super().mouseReleaseEvent(e)
@@ -64,7 +63,7 @@ def restoreDefaultCursor(self):
     def showAddHyperLinkUi(self):
         self.link_window.eText.setText(self.textCursor().selectedText())
         self.link_window.eLink.clear()
-        if self.link_window.exec_() == QDialog.Accepted:
+        if self.link_window.exec() == QDialog.DialogCode.Accepted:
             linkName = self.link_window.eText.text()
             linkAddress = self.link_window.eLink.text()
             cursor = self.textCursor()
diff --git a/metadata.txt b/metadata.txt
index 938563f..0415742 100644
--- a/metadata.txt
+++ b/metadata.txt
@@ -11,9 +11,9 @@
 [general]
 name=qNote
 qgisMinimumVersion=3.0
-qgisMaximumVersion=3.99
+qgisMaximumVersion=4.99
 description=Save notes in QGIS projects
-version=2.3
+version=2.4
 about=qNote is plugin for saving text notes in QGIS project files, basic HTML-formatting and hyperlinks are supported
 
 # end of mandatory metadata
@@ -22,6 +22,8 @@ about=qNote is plugin for saving text notes in QGIS project files, basic HTML-fo
 
 # Uncomment the following line and add your changelog entries:
 changelog=
+    2.4
+    - port to Qt6/QGIS 4.0
     2.3
     - fix mouse pointer behaviour
 
diff --git a/qnote.py b/qnote.py
index 1b659da..3019377 100644
--- a/qnote.py
+++ b/qnote.py
@@ -43,7 +43,7 @@ def initGui(self):
         self.iface.newProjectCreated.connect(self.clearEdit)
         
         self.dock = MainPanel()
-        self.iface.addDockWidget(Qt.BottomDockWidgetArea, self.dock)
+        self.iface.addDockWidget(Qt.DockWidgetArea.BottomDockWidgetArea, self.dock)
         
         self.loadData()
 
@@ -52,7 +52,7 @@ def unload(self):
         del self.dock
 
     def run(self):
-        self.iface.addDockWidget(Qt.BottomDockWidgetArea, self.dock)
+        self.iface.addDockWidget(Qt.DockWidgetArea.BottomDockWidgetArea, self.dock)
         self.loadData()
 
     def saveData(self):
diff --git a/qnote_panel.py b/qnote_panel.py
index 6147cb0..f85e613 100644
--- a/qnote_panel.py
+++ b/qnote_panel.py
@@ -1,8 +1,12 @@
 # -*- coding: utf-8 -*-
 
-from qgis.PyQt.QtWidgets import QDockWidget, QAction
+from qgis.PyQt.QtWidgets import QDockWidget
+try:
+    from qgis.PyQt.QtWidgets import QAction
+except ImportError:
+    from qgis.PyQt.QtGui import QAction
 from qgis.PyQt.QtGui import QIcon, QFont, QTextListFormat
-from qgis.PyQt.Qt import Qt
+from qgis.PyQt.QtCore import Qt
 from qgis.PyQt import uic
 from os import path
 
@@ -64,10 +68,10 @@ def addHyperlink(self):
         self.edit.showAddHyperLinkUi()
     
     def setBold(self):
-        if self.edit.fontWeight() == QFont.Bold:
-            self.edit.setFontWeight(QFont.Normal)
+        if self.edit.fontWeight() == QFont.Weight.Bold:
+            self.edit.setFontWeight(QFont.Weight.Normal)
         else:
-            self.edit.setFontWeight(QFont.Bold)
+            self.edit.setFontWeight(QFont.Weight.Bold)
     
     def setItalic(self):
         state = self.edit.fontItalic()
@@ -84,8 +88,8 @@ def setStrike(self):
 
     def setBulletList(self):
         cursor = self.edit.textCursor()
-        cursor.insertList(QTextListFormat.ListDisc)
+        cursor.insertList(QTextListFormat.Style.ListDisc)
 
     def setNumberList(self):
         cursor = self.edit.textCursor()
-        cursor.insertList(QTextListFormat.ListDecimal)
+        cursor.insertList(QTextListFormat.Style.ListDecimal)