diff --git a/src/gui_qt/lib/codeeditor.py b/src/gui_qt/lib/codeeditor.py
index f910b26..970b513 100644
--- a/src/gui_qt/lib/codeeditor.py
+++ b/src/gui_qt/lib/codeeditor.py
@@ -225,7 +225,7 @@ class CodeEditor(QtWidgets.QPlainTextEdit):
 
     def paintevent_linenumber(self, evt):
         painter = QtGui.QPainter(self.current_linenumber)
-        painter.fillRect(evt.rect(), QtCore.Qt.lightGray)
+        painter.fillRect(evt.rect(), QtCore.Qt.GlobalColor.lightGray)
 
         block = self.firstVisibleBlock()
         block_number = block.blockNumber()
@@ -237,9 +237,9 @@ class CodeEditor(QtWidgets.QPlainTextEdit):
         while block.isValid() and (top <= evt.rect().bottom()):
             if block.isVisible() and (bottom >= evt.rect().top()):
                 number = str(block_number + 1)
-                painter.setPen(QtCore.Qt.black)
+                painter.setPen(QtCore.Qt.GlobalColor.black)
                 painter.drawText(0, int(top), self.current_linenumber.width() - 3, height,
-                                 QtCore.Qt.AlignRight, number)
+                                 QtCore.Qt.AlignmentFlag.AlignRight, number)
 
             block = block.next()
             top = bottom
@@ -252,7 +252,7 @@ class CodeEditor(QtWidgets.QPlainTextEdit):
         if not self.isReadOnly():
             selection = QtWidgets.QTextEdit.ExtraSelection()
 
-            line_color = QtGui.QColor(QtCore.Qt.yellow).lighter(180)
+            line_color = QtGui.QColor(QtCore.Qt.GlobalColor.yellow).lighter(180)
 
             selection.format.setBackground(line_color)
             selection.format.setProperty(QtGui.QTextFormat.FullWidthSelection, True)
diff --git a/src/gui_qt/lib/usermodeleditor.py b/src/gui_qt/lib/usermodeleditor.py
index 28d2289..79867ae 100644
--- a/src/gui_qt/lib/usermodeleditor.py
+++ b/src/gui_qt/lib/usermodeleditor.py
@@ -55,13 +55,11 @@ class QUsermodelEditor(QtWidgets.QMainWindow):
             self.size(), QtWidgets.qApp.desktop().availableGeometry()
         ))
 
-    @property
     def is_modified(self):
-        return self.edit_field.document().isModified()
+        return self.edit_field.editor.document().isModified()
 
-    @is_modified.setter
-    def is_modified(self, val: bool):
-        self.edit_field.document().setModified(val)
+    def set_modified(self, val: bool):
+        self.edit_field.editor.document().setModified(val)
 
     @QtCore.pyqtSlot()
     def open_file(self):
@@ -83,9 +81,8 @@ class QUsermodelEditor(QtWidgets.QMainWindow):
         self._dir = self.fname.parent
         self.setWindowTitle('Edit ' + str(fname))
 
-    @property
     def changes_saved(self) -> bool:
-        if not self.is_modified:
+        if not self.is_modified():
             return True
 
         ret = QtWidgets.QMessageBox.question(self, 'Time to think',
@@ -97,9 +94,9 @@ class QUsermodelEditor(QtWidgets.QMainWindow):
             self.save_file()
 
         if ret == QtWidgets.QMessageBox.No:
-            self.is_modified = False
+            self.set_modified(False)
 
-        return not self.is_modified
+        return not self.is_modified()
 
     @QtCore.pyqtSlot()
     def save_file(self):
@@ -111,9 +108,9 @@ class QUsermodelEditor(QtWidgets.QMainWindow):
 
             self.set_fname_opts(outfile)
 
-            self.is_modified = False
+            self.set_modified(False)
 
-        return self.is_modified
+        return self.is_modified()
 
     @QtCore.pyqtSlot()
     def overwrite_file(self):
@@ -123,10 +120,10 @@ class QUsermodelEditor(QtWidgets.QMainWindow):
 
         self.modelsChanged.emit()
 
-        self.is_modified = False
+        self.set_modified(False)
 
     def closeEvent(self, evt: QtGui.QCloseEvent):
-        if self.is_modified:
+        if not self.changes_saved():
             evt.ignore()
         else:
             super().closeEvent(evt)