diff --git a/src/calibre/gui2/tweak_book/preview.py b/src/calibre/gui2/tweak_book/preview.py
index d71b485901..62819da82e 100644
--- a/src/calibre/gui2/tweak_book/preview.py
+++ b/src/calibre/gui2/tweak_book/preview.py
@@ -14,7 +14,7 @@ from PyQt5.Qt import (
 )
 from PyQt5.QtWebEngineCore import QWebEngineUrlSchemeHandler
 from PyQt5.QtWebEngineWidgets import (
-    QWebEnginePage, QWebEngineProfile, QWebEngineScript, QWebEngineView
+    QWebEnginePage, QWebEngineProfile, QWebEngineScript, QWebEngineView, QWebEngineSettings
 )
 from threading import Thread
 
@@ -287,8 +287,8 @@ def create_profile():
         ans.installUrlSchemeHandler(QByteArray(FAKE_PROTOCOL.encode('ascii')), url_handler)
         s = ans.settings()
         s.setDefaultTextEncoding('utf-8')
-        s.setAttribute(s.FullScreenSupportEnabled, False)
-        s.setAttribute(s.LinksIncludedInFocusChain, False)
+        s.setAttribute(QWebEngineSettings.WebAttribute.FullScreenSupportEnabled, False)
+        s.setAttribute(QWebEngineSettings.WebAttribute.LinksIncludedInFocusChain, False)
         create_profile.ans = ans
     return ans
 
diff --git a/src/calibre/gui2/viewer/web_view.py b/src/calibre/gui2/viewer/web_view.py
index 955082cdc0..d815fcbc34 100644
--- a/src/calibre/gui2/viewer/web_view.py
+++ b/src/calibre/gui2/viewer/web_view.py
@@ -13,7 +13,7 @@ from PyQt5.Qt import (
 )
 from PyQt5.QtWebEngineCore import QWebEngineUrlSchemeHandler
 from PyQt5.QtWebEngineWidgets import (
-    QWebEnginePage, QWebEngineProfile, QWebEngineScript, QWebEngineView
+    QWebEnginePage, QWebEngineProfile, QWebEngineScript, QWebEngineView, QWebEngineSettings
 )
 
 from calibre import as_unicode, prints
@@ -223,7 +223,7 @@ def create_profile():
         ans.installUrlSchemeHandler(QByteArray(FAKE_PROTOCOL.encode('ascii')), url_handler)
         s = ans.settings()
         s.setDefaultTextEncoding('utf-8')
-        s.setAttribute(s.LinksIncludedInFocusChain, False)
+        s.setAttribute(QWebEngineSettings.WebAttribute.LinksIncludedInFocusChain, False)
         create_profile.ans = ans
     return ans
 
diff --git a/src/calibre/gui2/webengine.py b/src/calibre/gui2/webengine.py
index d50ec12240..9c04e99338 100644
--- a/src/calibre/gui2/webengine.py
+++ b/src/calibre/gui2/webengine.py
@@ -6,7 +6,7 @@
 import json
 
 from PyQt5.Qt import QObject, Qt, pyqtSignal
-from PyQt5.QtWebEngineWidgets import QWebEnginePage, QWebEngineScript, QWebEngineView
+from PyQt5.QtWebEngineWidgets import QWebEnginePage, QWebEngineScript, QWebEngineView, QWebEngineSettings
 
 from calibre import prints
 from calibre.utils.monotonic import monotonic
@@ -18,17 +18,17 @@ def secure_webengine(view_or_page_or_settings, for_viewer=False):
     s = view_or_page_or_settings.settings() if hasattr(
         view_or_page_or_settings, 'settings') else view_or_page_or_settings
     a = s.setAttribute
-    a(s.PluginsEnabled, False)
+    a(QWebEngineSettings.WebAttribute.PluginsEnabled, False)
     if not for_viewer:
-        a(s.JavascriptEnabled, False)
+        a(QWebEngineSettings.WebAttribute.JavascriptEnabled, False)
         s.setUnknownUrlSchemePolicy(s.DisallowUnknownUrlSchemes)
         if hasattr(view_or_page_or_settings, 'setAudioMuted'):
             view_or_page_or_settings.setAudioMuted(True)
-    a(s.JavascriptCanOpenWindows, False)
-    a(s.JavascriptCanAccessClipboard, False)
+    a(QWebEngineSettings.WebAttribute.JavascriptCanOpenWindows, False)
+    a(QWebEngineSettings.WebAttribute.JavascriptCanAccessClipboard, False)
     # ensure javascript cannot read from local files
-    a(s.LocalContentCanAccessFileUrls, False)
-    a(s.AllowWindowActivationFromJavaScript, False)
+    a(QWebEngineSettings.WebAttribute.LocalContentCanAccessFileUrls, False)
+    a(QWebEngineSettings.WebAttribute.AllowWindowActivationFromJavaScript, False)
     return s