diff --git a/.github/workflows/type-checking.yml b/.github/workflows/type-checking.yml
index 195838ac..87f97175 100644
--- a/.github/workflows/type-checking.yml
+++ b/.github/workflows/type-checking.yml
@@ -30,7 +30,7 @@ jobs:
         run: python -m pip install . --user && python -m pip uninstall ryven --yes
         working-directory: ./ryven-editor
       - name: Install type-checking dependencies
-        run: python -m pip install mypy pyside2 types-Pygments --user
+        run: python -m pip install mypy pyside2 pyside6 PySide6-stubs types-Pygments --user
       - name: Typecheck
         run: mypy
         working-directory: .
diff --git a/debug.py b/debug.py
index e085eac2..c6d70b49 100755
--- a/debug.py
+++ b/debug.py
@@ -25,6 +25,6 @@
             f"{RYVEN_PATH}/ryven/example_nodes/std",
             f"{RYVEN_PATH}/ryven/example_nodes/linalg",
         ],
-        qt_api='pyside2',
+        qt_api='pyside6',
         show_dialog=False,
     )
diff --git a/ryven-editor/ryven/example_nodes/std/gui.py b/ryven-editor/ryven/example_nodes/std/gui.py
index 9ad118cb..c54e5a24 100644
--- a/ryven-editor/ryven/example_nodes/std/gui.py
+++ b/ryven-editor/ryven/example_nodes/std/gui.py
@@ -209,7 +209,7 @@ def rebuild_remove_actions(self):
                 {'method': self.remove_output, 'data': i}
 
 
-class ButtonNode_MainWidget(QPushButton, NodeMainWidget):
+class ButtonNode_MainWidget(NodeMainWidget, QPushButton):
 
     def __init__(self, params):
         NodeMainWidget.__init__(self, params)
diff --git a/ryven-editor/ryven/gui/flow_ui.py b/ryven-editor/ryven/gui/flow_ui.py
index 4cdf09fd..d7aeedab 100644
--- a/ryven-editor/ryven/gui/flow_ui.py
+++ b/ryven-editor/ryven/gui/flow_ui.py
@@ -103,7 +103,7 @@ def __init__(self, main_window, flow: Flow, flow_view: FlowView):
         self.ui.inspector_dock.setWidget(self.inspector_widget)
         
         #undo history widget
-        self.undo_widget = QUndoView(stack=self.flow_view._undo_stack)
+        self.undo_widget = QUndoView(stack=self.flow_view._undo_stack)  # type: ignore
         self.ui.undo_history_dock.setWidget(self.undo_widget)
         # logs
         self.ui.logs_scrollArea.setWidget(self.create_loggers_widget())
diff --git a/ryven-editor/ryven/gui/startup_dialog/StartupDialog.py b/ryven-editor/ryven/gui/startup_dialog/StartupDialog.py
index b4364aa0..c79025d8 100644
--- a/ryven-editor/ryven/gui/startup_dialog/StartupDialog.py
+++ b/ryven-editor/ryven/gui/startup_dialog/StartupDialog.py
@@ -71,7 +71,8 @@ def minimumSizeHint(self):
 
     def sizeHint(self):
         hint = self.fontMetrics().boundingRect(self.text()).size()
-        l, t, r, b = self.getContentsMargins()
+        c_margins = self.contentsMargins()
+        l, t, r, b = c_margins.left(), c_margins.top(), c_margins.right(), c_margins.bottom()
         margin = self.margin() * 2
         return QSize(
             min(100, hint.width()) + l + r + margin,
@@ -83,7 +84,8 @@ def paintEvent(self, event):
         opt = QStyleOptionFrame()
         self.initStyleOption(opt)
         self.style().drawControl(QStyle.CE_ShapedFrame, opt, qp, self)
-        l, t, r, b = self.getContentsMargins()
+        c_margins = self.contentsMargins()
+        l, t, r, b = c_margins.left(), c_margins.top(), c_margins.right(), c_margins.bottom()
         margin = self.margin()
         try:
             # since Qt >= 5.11
diff --git a/ryven-editor/ryven/main/Ryven.py b/ryven-editor/ryven/main/Ryven.py
index 75472f1f..ff1b9c02 100644
--- a/ryven-editor/ryven/main/Ryven.py
+++ b/ryven-editor/ryven/main/Ryven.py
@@ -7,6 +7,32 @@
 from ryven.main.args_parser import process_args
 
 
+def check_pyside_available(qt_api: str):
+    if qt_api == 'pyside2':
+        try:
+            import PySide2
+        except ImportError:
+            sys.exit(
+                'You are trying to use PySide2 as the Qt API, but it is not available. '
+                'please install it, or use pyside6 as the Qt API. Either of those can '
+                'installed through pip, e.g. `pip install pyside2` or `pip install \'pyside6<6.7\'`. '
+            )
+    elif qt_api == 'pyside6':
+        try:
+            import PySide6
+        except ImportError:
+            sys.exit(
+                'You are trying to use PySide6 as the Qt API, but it is not available. '
+                'please install it, or use pyside2 as the Qt API. Either of those can '
+                'installed through pip, e.g. `pip install pyside2` or `pip install \'pyside6<6.7\'`. '
+            )
+    else:
+        sys.exit(
+            f'Error: Illegal Qt API: "{qt_api}". '
+            f'Use either "pyside2" or "pyside6". '
+        )
+
+
 def run(*args_,
         qt_app=None, gui_parent=None, use_sysargs: bool = True,
         **kwargs):
@@ -72,6 +98,7 @@ def run(*args_,
     #
 
     # Init environment
+    check_pyside_available(conf.qt_api)
     os.environ['RYVEN_MODE'] = 'gui'
     os.environ['QT_API'] = conf.qt_api
     from ryven.node_env import init_node_env
diff --git a/ryvencore-qt/ryvencore_qt/src/flows/FlowView.py b/ryvencore-qt/ryvencore_qt/src/flows/FlowView.py
index bb2ff344..b91d81f6 100644
--- a/ryvencore-qt/ryvencore_qt/src/flows/FlowView.py
+++ b/ryvencore-qt/ryvencore_qt/src/flows/FlowView.py
@@ -39,12 +39,17 @@
     QShortcut,
     QMenu,
     QGraphicsItem,
-    QUndoStack,
     QPushButton,
     QHBoxLayout,
     QWidget,
 )
 
+# for compatibility between qt5 and qt6
+try:
+    from qtpy.QtGui import QUndoStack
+except ImportError:
+    from qtpy.QtWidgets import QUndoStack  # type: ignore
+
 from ryvencore.Flow import Flow
 from ryvencore.Node import Node
 from ryvencore.NodePort import NodePort, NodeInput, NodeOutput
@@ -262,13 +267,11 @@ def init_proxy_widget(widget: QWidget, proxy: FlowViewProxyWidget):
         menu_layout_widget.layout().addWidget(menu_button)
 
         def menu_button_clicked():
-            point = self._menu_layout_proxy.scenePos()
-            view_pos = self.mapFromScene(point.toPoint())
-            # apply offset after
-            global_pos = self.viewport().mapToGlobal(
-                view_pos) + QPoint(8, self._menu_layout_proxy.widget().height()
-            ) 
-            self._menu.exec_(global_pos)
+            # prob not entirely correct, since menu is part of a layout
+            # but since it's the first item, it's the same
+            menu_pos = self._menu_button.pos()
+            menu_pos = self.mapToGlobal(menu_pos) + QPoint(8, self._menu_button.height() + 10)
+            self._menu.exec_(menu_pos)
 
         menu_button.clicked.connect(menu_button_clicked)
 
@@ -514,13 +517,15 @@ def wheelEvent(self, event):
         if event.modifiers() & Qt.ControlModifier:
             event.accept()
 
-            self._zoom_data['viewport pos'] = event.posF()
-            self._zoom_data['scene pos'] = pointF_mapped(self.mapToScene(event.pos()), event.posF())
+            view_pos = event.position()
+            self._zoom_data['viewport pos'] = view_pos
+            self._zoom_data['scene pos'] = self.mapToScene(view_pos.toPoint())
 
-            self._zoom_data['delta'] += event.delta()
+            y_delta = event.angleDelta().y()
+            self._zoom_data['delta'] += y_delta
 
-            if self._zoom_data['delta'] * event.delta() < 0:
-                self._zoom_data['delta'] = event.delta()
+            if self._zoom_data['delta'] * y_delta < 0:
+                self._zoom_data['delta'] = y_delta()
 
             anim = QTimeLine(100, self)
             anim.setUpdateInterval(10)
diff --git a/ryvencore-qt/ryvencore_qt/src/flows/node_list_widget/NodeListWidget.py b/ryvencore-qt/ryvencore_qt/src/flows/node_list_widget/NodeListWidget.py
index 0f2b59fc..35a41367 100644
--- a/ryvencore-qt/ryvencore_qt/src/flows/node_list_widget/NodeListWidget.py
+++ b/ryvencore-qt/ryvencore_qt/src/flows/node_list_widget/NodeListWidget.py
@@ -151,10 +151,10 @@ def search_pkg_tree(self, search: str):
             # removes whitespace and escapes all special regex chars
             new_search = escape(search.strip())
             # regex that enforces the text starts with <new_search>
-            self.pack_proxy_model.setFilterRegExp(f'^{new_search}')
+            self.pack_proxy_model.setFilterRegularExpression(f'^{new_search}')
             self.pack_tree.expandAll()
         else:
-            self.pack_proxy_model.setFilterRegExp('')
+            self.pack_proxy_model.setFilterRegularExpression('')
             self.pack_tree.collapseAll()
 
     def make_nodes_current(self, pack_nodes, pkg_name: str):
diff --git a/ryvencore-qt/setup.cfg b/ryvencore-qt/setup.cfg
index b41ee170..faf786fb 100644
--- a/ryvencore-qt/setup.cfg
+++ b/ryvencore-qt/setup.cfg
@@ -21,7 +21,6 @@ include_package_data = True
 python_requires = >=3.6, <3.11
 install_requires =
     ryvencore ==0.4.*
-    PySide2
     QtPy
     waiting
     textdistance