diff --git a/src/calibre/gui2/splash_screen.py b/src/calibre/gui2/splash_screen.py
index 00e18351f3..467bd5709c 100644
--- a/src/calibre/gui2/splash_screen.py
+++ b/src/calibre/gui2/splash_screen.py
@@ -5,7 +5,7 @@
 
 from PyQt5.Qt import (
     QApplication, QBrush, QColor, QFont, QFontMetrics, QPen, QPixmap, QSplashScreen,
-    Qt
+    Qt, QPainter
 )
 
 from calibre.constants import __appname__, numeric_version
@@ -55,8 +55,8 @@ class SplashScreen(QSplashScreen):
     def drawContents(self, painter):
         self.drawn_once = True
         painter.save()
-        painter.setRenderHint(painter.TextAntialiasing, True)
-        painter.setRenderHint(painter.Antialiasing, True)
+        painter.setRenderHint(QPainter.RenderHint.TextAntialiasing, True)
+        painter.setRenderHint(QPainter.RenderHint.Antialiasing, True)
         pw = self.LOGO_SIZE
         height = max(pw, self.total_height)
         width = self.width()
diff --git a/src/calibre/gui2/tweak_book/editor/canvas.py b/src/calibre/gui2/tweak_book/editor/canvas.py
index da19e5cba2..e911b50454 100644
--- a/src/calibre/gui2/tweak_book/editor/canvas.py
+++ b/src/calibre/gui2/tweak_book/editor/canvas.py
@@ -199,7 +199,7 @@ class Replace(Command):
             img = self.after_image = QImage(canvas.current_image)
             rect = QRectF(*get_selection_rect(img, canvas.selection_state.rect, canvas.target))
             p = QPainter(img)
-            p.setRenderHint(p.SmoothPixmapTransform, True)
+            p.setRenderHint(QPainter.RenderHint.SmoothPixmapTransform, True)
             p.drawImage(rect, pimg, QRectF(pimg.rect()))
             p.end()
         return self.after_image
diff --git a/src/calibre/gui2/tweak_book/editor/widget.py b/src/calibre/gui2/tweak_book/editor/widget.py
index 7a4c2c8205..0fb4a97545 100644
--- a/src/calibre/gui2/tweak_book/editor/widget.py
+++ b/src/calibre/gui2/tweak_book/editor/widget.py
@@ -40,7 +40,7 @@ def create_icon(text, palette=None, sz=None, divider=2, fill='white'):
     img = QImage(sz, sz, QImage.Format.Format_ARGB32)
     img.fill(Qt.GlobalColor.transparent)
     p = QPainter(img)
-    p.setRenderHints(p.TextAntialiasing | p.Antialiasing)
+    p.setRenderHints(QPainter.RenderHint.TextAntialiasing | QPainter.RenderHint.Antialiasing)
     if fill is not None:
         qDrawShadeRect(p, img.rect(), palette, fill=fill, lineWidth=1, midLineWidth=1)
     f = p.font()