diff --git a/src/calibre/gui2/comments_editor.py b/src/calibre/gui2/comments_editor.py
index 61f5e8f7f2..2a451e5eda 100644
--- a/src/calibre/gui2/comments_editor.py
+++ b/src/calibre/gui2/comments_editor.py
@@ -589,7 +589,7 @@ class EditorWidget(QTextEdit, LineEditECM):  # {{{
 
     def do_insert_hr(self, *args):
         with self.editing_cursor() as c:
-            c.movePosition(c.EndOfBlock, c.MoveAnchor)
+            c.movePosition(QTextCursor.MoveOperation.EndOfBlock, c.MoveAnchor)
             c.insertHtml('<hr>')
 
     def do_insert_link(self, *args):
diff --git a/src/calibre/gui2/css_transform_rules.py b/src/calibre/gui2/css_transform_rules.py
index 612befc8a4..6ecb501fba 100644
--- a/src/calibre/gui2/css_transform_rules.py
+++ b/src/calibre/gui2/css_transform_rules.py
@@ -5,7 +5,7 @@
 
 from PyQt5.Qt import (
     QWidget, QVBoxLayout, QHBoxLayout, QLabel, QComboBox, QLineEdit,
-    QPushButton, QSize, pyqtSignal, QMenu, QDialogButtonBox
+    QPushButton, QSize, pyqtSignal, QMenu, QDialogButtonBox, QTextCursor
 )
 
 from calibre.ebooks.css_transform_rules import (
@@ -211,7 +211,7 @@ class Tester(Dialog):  # {{{
         t.load_text('/* %s */\n' % _('Enter CSS rules below and click the "Test" button'), 'css')
         la.setBuddy(t)
         c = t.textCursor()
-        c.movePosition(c.End)
+        c.movePosition(QTextCursor.MoveOperation.End)
         t.setTextCursor(c)
         self.h = h = QHBoxLayout()
         l.addLayout(h)
diff --git a/src/calibre/gui2/tweak_book/diff/view.py b/src/calibre/gui2/tweak_book/diff/view.py
index cd3a57b5e5..b8ab1b9f14 100644
--- a/src/calibre/gui2/tweak_book/diff/view.py
+++ b/src/calibre/gui2/tweak_book/diff/view.py
@@ -522,7 +522,7 @@ class DiffSplit(QSplitter):  # {{{
     def finalize(self):
         for v in (self.left, self.right):
             c = v.textCursor()
-            c.movePosition(c.Start)
+            c.movePosition(QTextCursor.MoveOperation.Start)
             v.setTextCursor(c)
         self.update()
 
@@ -536,14 +536,14 @@ class DiffSplit(QSplitter):  # {{{
         self.right.headers.append((self.right.blockCount() - 1, right_name))
         for v in (self.left, self.right):
             c = v.textCursor()
-            c.movePosition(c.End)
+            c.movePosition(QTextCursor.MoveOperation.End)
             (c.insertBlock(), c.insertBlock(), c.insertBlock())
 
         with BusyCursor():
             if is_identical:
                 for v in (self.left, self.right):
                     c = v.textCursor()
-                    c.movePosition(c.End)
+                    c.movePosition(QTextCursor.MoveOperation.End)
                     c.insertText('[%s]\n\n' % _('The files are identical'))
             elif left_name != right_name and not left_text and not right_text:
                 self.add_text_diff(_('[This file was renamed to %s]') % right_name, _('[This file was renamed from %s]') % left_name, context, None)
@@ -605,10 +605,10 @@ class DiffSplit(QSplitter):  # {{{
         QApplication.processEvents(QEventLoop.ProcessEventsFlag.ExcludeUserInputEvents | QEventLoop.ProcessEventsFlag.ExcludeSocketNotifiers)
         for v, img, size in ((self.left, left_img, len(left_data)), (self.right, right_img, len(right_data))):
             c = v.textCursor()
-            c.movePosition(c.End)
+            c.movePosition(QTextCursor.MoveOperation.End)
             start = c.block().blockNumber()
             lines, w = self.get_lines_for_image(img, v)
-            c.movePosition(c.StartOfBlock)
+            c.movePosition(QTextCursor.MoveOperation.StartOfBlock)
             if size > 0:
                 c.beginEditBlock()
                 c.insertText(_('Size: {0} Resolution: {1}x{2}').format(human_readable(size), img.width(), img.height()))
@@ -638,12 +638,12 @@ class DiffSplit(QSplitter):  # {{{
                 top, bot, kind = v.changes[i]
                 c = QTextCursor(v.document().findBlockByNumber(top+1))
                 c.beginEditBlock()
-                c.movePosition(c.StartOfBlock)
+                c.movePosition(QTextCursor.MoveOperation.StartOfBlock)
                 if delta > 0:
                     for _ in range(delta):
                         c.insertBlock()
                 else:
-                    c.movePosition(c.NextBlock, c.KeepAnchor, -delta)
+                    c.movePosition(QTextCursor.MoveOperation.NextBlock, c.KeepAnchor, -delta)
                     c.removeSelectedText()
                 c.endEditBlock()
                 v.images[top] = (img, w, lines)
@@ -678,7 +678,7 @@ class DiffSplit(QSplitter):  # {{{
             if len(left_text) == len(right_text) and left_text == right_text:
                 for v in (self.left, self.right):
                     c = v.textCursor()
-                    c.movePosition(c.End)
+                    c.movePosition(QTextCursor.MoveOperation.End)
                     c.insertText('[%s]\n\n' % _('The files are identical after beautifying'))
                 return
 
@@ -690,7 +690,7 @@ class DiffSplit(QSplitter):  # {{{
         left_highlight, right_highlight = get_highlighter(self.left, left_text, syntax), get_highlighter(self.right, right_text, syntax)
         cl, cr = self.left_cursor, self.right_cursor = self.left.textCursor(), self.right.textCursor()
         cl.beginEditBlock(), cr.beginEditBlock()
-        cl.movePosition(cl.End), cr.movePosition(cr.End)
+        cl.movePosition(QTextCursor.MoveOperation.End), cr.movePosition(QTextCursor.MoveOperation.End)
         self.left_insert = partial(self.do_insert, cl, left_highlight, self.left.line_number_map)
         self.right_insert = partial(self.do_insert, cr, right_highlight, self.right.line_number_map)
 
diff --git a/src/calibre/gui2/tweak_book/editor/smarts/css.py b/src/calibre/gui2/tweak_book/editor/smarts/css.py
index 6b8099ff67..cbaf93d3e7 100644
--- a/src/calibre/gui2/tweak_book/editor/smarts/css.py
+++ b/src/calibre/gui2/tweak_book/editor/smarts/css.py
@@ -7,7 +7,7 @@ __copyright__ = '2014, Kovid Goyal <kovid at kovidgoyal.net>'
 
 import re
 
-from PyQt5.Qt import Qt
+from PyQt5.Qt import Qt, QTextCursor
 
 from calibre.gui2.tweak_book import current_container
 from calibre.gui2.tweak_book.editor.smarts import NullSmarts
@@ -77,7 +77,7 @@ class Smarts(NullSmarts):
 
     def get_completion_data(self, editor, ev=None):
         c = editor.textCursor()
-        c.movePosition(c.StartOfLine, c.KeepAnchor)
+        c.movePosition(QTextCursor.MoveOperation.StartOfLine, c.KeepAnchor)
         text = c.selectedText()
         m = self.complete_attr_pat.search(text)
         if m is None:
diff --git a/src/calibre/gui2/tweak_book/editor/smarts/html.py b/src/calibre/gui2/tweak_book/editor/smarts/html.py
index fad4c1bad1..a35e09c577 100644
--- a/src/calibre/gui2/tweak_book/editor/smarts/html.py
+++ b/src/calibre/gui2/tweak_book/editor/smarts/html.py
@@ -321,10 +321,10 @@ class Smarts(NullSmarts):
         def add_tag(tag):
             a = QTextEdit.ExtraSelection()
             a.cursor, a.format = editor.textCursor(), editor.match_paren_format
-            a.cursor.setPosition(tag.start_block.position()), a.cursor.movePosition(a.cursor.EndOfBlock, a.cursor.KeepAnchor)
+            a.cursor.setPosition(tag.start_block.position()), a.cursor.movePosition(a.QTextCursor.MoveOperation.EndOfBlock, a.cursor.KeepAnchor)
             text = unicode_type(a.cursor.selectedText())
             start_pos = utf16_length(text[:tag.start_offset])
-            a.cursor.setPosition(tag.end_block.position()), a.cursor.movePosition(a.cursor.EndOfBlock, a.cursor.KeepAnchor)
+            a.cursor.setPosition(tag.end_block.position()), a.cursor.movePosition(a.QTextCursor.MoveOperation.EndOfBlock, a.cursor.KeepAnchor)
             text = unicode_type(a.cursor.selectedText())
             end_pos = utf16_length(text[:tag.end_offset + 1])
             a.cursor.setPosition(tag.start_block.position() + start_pos)
@@ -805,7 +805,7 @@ class Smarts(NullSmarts):
                 if in_text:
                     # Add remaining text in block
                     c.setPosition(block.position() + boundaries[-1].offset + 1)
-                    c.movePosition(c.EndOfBlock, c.KeepAnchor)
+                    c.movePosition(QTextCursor.MoveOperation.EndOfBlock, c.KeepAnchor)
                     if c.hasSelection():
                         append(c.selectedText() + '\n', c.anchor())
             block = block.next()
diff --git a/src/calibre/gui2/tweak_book/editor/smarts/utils.py b/src/calibre/gui2/tweak_book/editor/smarts/utils.py
index 101e0941e2..4a136abb8c 100644
--- a/src/calibre/gui2/tweak_book/editor/smarts/utils.py
+++ b/src/calibre/gui2/tweak_book/editor/smarts/utils.py
@@ -5,13 +5,13 @@
 __license__ = 'GPL v3'
 __copyright__ = '2014, Kovid Goyal <kovid at kovidgoyal.net>'
 
-from PyQt5.Qt import Qt
+from PyQt5.Qt import Qt, QTextCursor
 
 
 def get_text_around_cursor(editor, before=True):
     cursor = editor.textCursor()
     cursor.clearSelection()
-    cursor.movePosition((cursor.StartOfBlock if before else cursor.EndOfBlock), cursor.KeepAnchor)
+    cursor.movePosition((QTextCursor.MoveOperation.StartOfBlock if before else QTextCursor.MoveOperation.EndOfBlock), cursor.KeepAnchor)
     text = editor.selected_text_from_cursor(cursor)
     return cursor, text
 
@@ -22,9 +22,9 @@ get_text_after_cursor = lambda editor: get_text_around_cursor(editor, before=Fal
 
 def is_cursor_on_wrapped_line(editor):
     cursor = editor.textCursor()
-    cursor.movePosition(cursor.StartOfLine)
+    cursor.movePosition(QTextCursor.MoveOperation.StartOfLine)
     sol = cursor.position()
-    cursor.movePosition(cursor.StartOfBlock)
+    cursor.movePosition(QTextCursor.MoveOperation.StartOfBlock)
     return sol != cursor.position()
 
 
@@ -61,10 +61,10 @@ def smart_home(editor, ev):
         cursor, text = get_text_before_cursor(editor)
         cursor = editor.textCursor()
         mode = cursor.KeepAnchor if test_modifiers(ev, Qt.KeyboardModifier.ShiftModifier) else cursor.MoveAnchor
-        cursor.movePosition(cursor.StartOfBlock, mode)
+        cursor.movePosition(QTextCursor.MoveOperation.StartOfBlock, mode)
         if text.strip() and text.lstrip() != text:
             # Move to the start of text
-            cursor.movePosition(cursor.NextWord, mode)
+            cursor.movePosition(QTextCursor.MoveOperation.NextWord, mode)
         editor.setTextCursor(cursor)
         return True
     return False
diff --git a/src/calibre/gui2/tweak_book/editor/syntax/base.py b/src/calibre/gui2/tweak_book/editor/syntax/base.py
index bae26c262c..ac1442b4bf 100644
--- a/src/calibre/gui2/tweak_book/editor/syntax/base.py
+++ b/src/calibre/gui2/tweak_book/editor/syntax/base.py
@@ -136,7 +136,7 @@ class SyntaxHighlighter(object):
         if not last_block.isValid():
             last_block = doc.lastBlock()
         end_cursor = QTextCursor(last_block)
-        end_cursor.movePosition(end_cursor.EndOfBlock)
+        end_cursor.movePosition(QTextCursor.MoveOperation.EndOfBlock)
         self.requests.append((start_cursor, end_cursor))
         QTimer.singleShot(0, self.do_one_block)
 
@@ -158,7 +158,7 @@ class SyntaxHighlighter(object):
             except AttributeError:
                 self.requests.clear()
                 return
-            ok = start_cursor.movePosition(start_cursor.NextBlock)
+            ok = start_cursor.movePosition(QTextCursor.MoveOperation.NextBlock)
             if not ok:
                 self.requests.popleft()
                 return
diff --git a/src/calibre/gui2/tweak_book/editor/text.py b/src/calibre/gui2/tweak_book/editor/text.py
index 7a1fbf6847..24fc698a5b 100644
--- a/src/calibre/gui2/tweak_book/editor/text.py
+++ b/src/calibre/gui2/tweak_book/editor/text.py
@@ -6,17 +6,15 @@
 import importlib
 import os
 import re
+import regex
 import textwrap
 import unicodedata
-from polyglot.builtins import unicode_type, map, range, as_unicode
-
 from PyQt5.Qt import (
     QColor, QColorDialog, QFont, QFontDatabase, QKeySequence, QPainter, QPalette,
-    QPlainTextEdit, QRect, QSize, Qt, QTextEdit, QTextFormat, QTimer, QToolTip,
-    QWidget, pyqtSignal
+    QPlainTextEdit, QRect, QSize, Qt, QTextCursor, QTextEdit, QTextFormat, QTimer,
+    QToolTip, QWidget, pyqtSignal
 )
 
-import regex
 from calibre import prepare_string_for_xml
 from calibre.ebooks.oeb.base import OEB_DOCS, OEB_STYLES, css_text
 from calibre.ebooks.oeb.polish.replace import get_recommended_folders
@@ -42,6 +40,7 @@ from calibre.utils.icu import (
 )
 from calibre.utils.img import image_to_data
 from calibre.utils.titlecase import titlecase
+from polyglot.builtins import as_unicode, map, range, unicode_type
 
 
 def get_highlighter(syntax):
@@ -308,22 +307,22 @@ class TextEdit(PlainTextEdit):
         lnum = max(1, min(self.blockCount(), lnum))
         c = self.textCursor()
         c.clearSelection()
-        c.movePosition(c.Start)
-        c.movePosition(c.NextBlock, n=lnum - 1)
-        c.movePosition(c.StartOfLine)
-        c.movePosition(c.EndOfLine, c.KeepAnchor)
+        c.movePosition(QTextCursor.MoveOperation.Start)
+        c.movePosition(QTextCursor.MoveOperation.NextBlock, n=lnum - 1)
+        c.movePosition(QTextCursor.MoveOperation.StartOfLine)
+        c.movePosition(QTextCursor.MoveOperation.EndOfLine, c.KeepAnchor)
         text = unicode_type(c.selectedText()).rstrip('\0')
         if col is None:
-            c.movePosition(c.StartOfLine)
+            c.movePosition(QTextCursor.MoveOperation.StartOfLine)
             lt = text.lstrip()
             if text and lt and lt != text:
-                c.movePosition(c.NextWord)
+                c.movePosition(QTextCursor.MoveOperation.NextWord)
         else:
             c.setPosition(c.block().position() + col)
             if c.blockNumber() + 1 > lnum:
                 # We have moved past the end of the line
                 c.setPosition(c.block().position())
-                c.movePosition(c.EndOfBlock)
+                c.movePosition(QTextCursor.MoveOperation.EndOfBlock)
         self.setTextCursor(c)
         self.ensureCursorVisible()
 
@@ -440,12 +439,12 @@ class TextEdit(PlainTextEdit):
                      ' Are you sure you want to proceed?'), 'edit-book-confirm-sort-css', parent=self, config_set=tprefs):
             c = self.textCursor()
             c.beginEditBlock()
-            c.movePosition(c.Start), c.movePosition(c.End, c.KeepAnchor)
+            c.movePosition(QTextCursor.MoveOperation.Start), c.movePosition(QTextCursor.MoveOperation.End, c.KeepAnchor)
             text = unicode_type(c.selectedText()).replace(PARAGRAPH_SEPARATOR, '\n').rstrip('\0')
             from calibre.ebooks.oeb.polish.css import sort_sheet
             text = css_text(sort_sheet(current_container(), text))
             c.insertText(text)
-            c.movePosition(c.Start)
+            c.movePosition(QTextCursor.MoveOperation.Start)
             c.endEditBlock()
             self.setTextCursor(c)
 
@@ -457,10 +456,10 @@ class TextEdit(PlainTextEdit):
         c.clearSelection()
         if complete:
             # Search the entire text
-            c.movePosition(c.End if reverse else c.Start)
-        pos = c.Start if reverse else c.End
+            c.movePosition(QTextCursor.MoveOperation.End if reverse else QTextCursor.MoveOperation.Start)
+        pos = QTextCursor.MoveOperation.Start if reverse else QTextCursor.MoveOperation.End
         if wrap and not complete:
-            pos = c.End if reverse else c.Start
+            pos = QTextCursor.MoveOperation.End if reverse else QTextCursor.MoveOperation.Start
         c.movePosition(pos, c.KeepAnchor)
         raw = unicode_type(c.selectedText()).replace(PARAGRAPH_SEPARATOR, '\n').rstrip('\0')
         m = pat.search(raw)
@@ -496,10 +495,10 @@ class TextEdit(PlainTextEdit):
         c.clearSelection()
         if complete:
             # Search the entire text
-            c.movePosition(c.End if reverse else c.Start)
-        pos = c.Start if reverse else c.End
+            c.movePosition(QTextCursor.MoveOperation.End if reverse else QTextCursor.MoveOperation.Start)
+        pos = QTextCursor.MoveOperation.Start if reverse else QTextCursor.MoveOperation.End
         if wrap and not complete:
-            pos = c.End if reverse else c.Start
+            pos = QTextCursor.MoveOperation.End if reverse else QTextCursor.MoveOperation.Start
         c.movePosition(pos, c.KeepAnchor)
         if hasattr(self.smarts, 'find_text'):
             self.highlighter.join()
@@ -528,8 +527,8 @@ class TextEdit(PlainTextEdit):
         c = self.textCursor()
         c.setPosition(c.position())
         if not from_cursor:
-            c.movePosition(c.Start)
-        c.movePosition(c.End, c.KeepAnchor)
+            c.movePosition(QTextCursor.MoveOperation.Start)
+        c.movePosition(QTextCursor.MoveOperation.End, c.KeepAnchor)
 
         def find_first_word(haystack):
             match_pos, match_word = -1, None
@@ -555,14 +554,14 @@ class TextEdit(PlainTextEdit):
                         self.centerCursor()
                     return True
             c.setPosition(c.position())
-            c.movePosition(c.End, c.KeepAnchor)
+            c.movePosition(QTextCursor.MoveOperation.End, c.KeepAnchor)
 
         return False
 
     def find_next_spell_error(self, from_cursor=True):
         c = self.textCursor()
         if not from_cursor:
-            c.movePosition(c.Start)
+            c.movePosition(QTextCursor.MoveOperation.Start)
         block = c.block()
         while block.isValid():
             for r in block.layout().additionalFormats():
@@ -600,7 +599,7 @@ class TextEdit(PlainTextEdit):
     def go_to_anchor(self, anchor):
         if anchor is TOP:
             c = self.textCursor()
-            c.movePosition(c.Start)
+            c.movePosition(QTextCursor.MoveOperation.Start)
             self.setTextCursor(c)
             return True
         base = r'''%%s\s*=\s*['"]{0,1}%s''' % regex.escape(anchor)
@@ -726,7 +725,7 @@ class TextEdit(PlainTextEdit):
 
     def recheck_word(self, word, locale):
         c = self.textCursor()
-        c.movePosition(c.Start)
+        c.movePosition(QTextCursor.MoveOperation.Start)
         block = c.block()
         while block.isValid():
             for r in block.layout().additionalFormats():
@@ -956,7 +955,7 @@ version="1.1" width="100%%" height="100%%" viewBox="0 0 {w} {h}" preserveAspectR
         c = self.textCursor()
         c.clearSelection()
         c.setPosition(0)
-        c.movePosition(c.End, c.KeepAnchor)
+        c.movePosition(QTextCursor.MoveOperation.End, c.KeepAnchor)
         self.setTextCursor(c)
 
     def rename_block_tag(self, new_name):
diff --git a/src/calibre/gui2/tweak_book/editor/widget.py b/src/calibre/gui2/tweak_book/editor/widget.py
index b7b06f07b9..eb80ac890f 100644
--- a/src/calibre/gui2/tweak_book/editor/widget.py
+++ b/src/calibre/gui2/tweak_book/editor/widget.py
@@ -476,7 +476,7 @@ class Editor(QMainWindow):
         col = c.positionInBlock()
         if not c.atStart():
             c.clearSelection()
-            c.movePosition(c.PreviousCharacter, c.KeepAnchor)
+            c.movePosition(QTextCursor.MoveOperation.PreviousCharacter, c.KeepAnchor)
             char = unicode_type(c.selectedText()).rstrip('\0')
         return (c.blockNumber() + 1, col, char)
 
diff --git a/src/calibre/gui2/widgets2.py b/src/calibre/gui2/widgets2.py
index 0ef24a221f..a52caf8dd9 100644
--- a/src/calibre/gui2/widgets2.py
+++ b/src/calibre/gui2/widgets2.py
@@ -9,7 +9,7 @@ from PyQt5.Qt import (
     QComboBox, QDate, QDateTime, QDateTimeEdit, QDialog, QDialogButtonBox, QFont,
     QFontInfo, QFontMetrics, QIcon, QKeySequence, QLabel, QLayout, QMenu, QMimeData,
     QPalette, QPixmap, QPoint, QPushButton, QRect, QScrollArea, QSize, QSizePolicy,
-    QStyle, QStyledItemDelegate, Qt, QTabWidget, QTextBrowser, QToolButton,
+    QStyle, QStyledItemDelegate, Qt, QTabWidget, QTextBrowser, QToolButton, QTextCursor,
     QUndoCommand, QUndoStack, QUrl, QWidget, pyqtSignal
 )
 
@@ -558,8 +558,8 @@ def to_plain_text(self):
     # that
     c = self.textCursor()
     c.clearSelection()
-    c.movePosition(c.Start)
-    c.movePosition(c.End, c.KeepAnchor)
+    c.movePosition(QTextCursor.MoveOperation.Start)
+    c.movePosition(QTextCursor.MoveOperation.End, c.KeepAnchor)
     ans = c.selectedText().replace(PARAGRAPH_SEPARATOR, '\n')
     # QTextCursor pads the return value of selectedText with null bytes if
     # non BMP characters such as 0x1f431 are present.