diff --git a/lib/foundation/appdata.dart b/lib/foundation/appdata.dart
index ab0738b..7031dd7 100644
--- a/lib/foundation/appdata.dart
+++ b/lib/foundation/appdata.dart
@@ -143,7 +143,6 @@ class _Settings with ChangeNotifier {
     'quickFavorite': null,
     'enableTurnPageByVolumeKey': true,
     'enableClockAndBatteryInfoInReader': true,
-    'ignoreCertificateErrors': false,
     'supportSwipeToFavorite': 'yes', // yes, no
     'authorizationRequired': false,
     'onClickFavorite': 'viewDetail', // viewDetail, read