diff --git a/app/src/BooksBookModel.cpp b/app/src/BooksBookModel.cpp
index d7e5dee..460cfae 100644
--- a/app/src/BooksBookModel.cpp
+++ b/app/src/BooksBookModel.cpp
@@ -1,6 +1,6 @@
 /*
- * Copyright (C) 2015-2020 Jolla Ltd.
- * Copyright (C) 2015-2020 Slava Monich <slava.monich@jolla.com>
+ * Copyright (C) 2015-2021 Jolla Ltd.
+ * Copyright (C) 2015-2021 Slava Monich <slava.monich@jolla.com>
  *
  * You may use this file under the terms of the BSD license as follows:
  *
@@ -65,7 +65,7 @@ class BooksBookModel::PagingTask : public HarbourTask
     Q_OBJECT
 
 public:
-    static const quint32 MarksFileVersion = 2;
+    static const quint32 MarksFileVersion = 3;
     static const char MarksFileMagic[];
     struct MarksHeader {
         char magic[4];