diff --git a/app/src/BooksBookModel.cpp b/app/src/BooksBookModel.cpp
index bca0d9d..143fe52 100644
--- a/app/src/BooksBookModel.cpp
+++ b/app/src/BooksBookModel.cpp
@@ -65,7 +65,7 @@ class BooksBookModel::PagingTask : public HarbourTask
     Q_OBJECT
 
 public:
-    static const quint32 MarksFileVersion = 1;
+    static const quint32 MarksFileVersion = 2;
     static const char MarksFileMagic[];
     struct MarksHeader {
         char magic[4];