diff --git a/lib/foundation/history.dart b/lib/foundation/history.dart
index 00d96d1..5ca6236 100644
--- a/lib/foundation/history.dart
+++ b/lib/foundation/history.dart
@@ -245,8 +245,17 @@ class HistoryManager with ChangeNotifier {
     });
   }
 
+  bool _haveAsyncTask = false;
+
+  /// Create a isolate to add history to prevent blocking the UI thread.
   Future<void> addHistoryAsync(History newItem) async {
-    _addHistoryAsync(_db.handle.address, newItem);
+    while (_haveAsyncTask) {
+      await Future.delayed(Duration(milliseconds: 20));
+    }
+
+    _haveAsyncTask = true;
+    await _addHistoryAsync(_db.handle.address, newItem);
+    _haveAsyncTask = false;
   }
 
   /// add history. if exists, update time.
diff --git a/lib/pages/reader/reader.dart b/lib/pages/reader/reader.dart
index 11fcf89..ed1cb71 100644
--- a/lib/pages/reader/reader.dart
+++ b/lib/pages/reader/reader.dart
@@ -230,6 +230,10 @@ class _ReaderState extends State<Reader> with _ReaderLocation, _ReaderWindow {
     updateHistory();
   }
 
+  /// Prevent multiple history updates in a short time.
+  /// `HistoryManager().addHistoryAsync` is a high-cost operation because it creates a new isolate.
+  Timer? _updateHistoryTimer;
+
   void updateHistory() {
     if (history != null) {
       history!.page = page;
@@ -239,7 +243,11 @@ class _ReaderState extends State<Reader> with _ReaderLocation, _ReaderWindow {
       }
       history!.readEpisode.add(chapter);
       history!.time = DateTime.now();
-      HistoryManager().addHistoryAsync(history!);
+      _updateHistoryTimer?.cancel();
+      _updateHistoryTimer = Timer(const Duration(seconds: 1), () {
+        HistoryManager().addHistoryAsync(history!);
+        _updateHistoryTimer = null;
+      });
     }
   }