diff --git a/calibre.spec b/calibre.spec
index 95550f9..7737f39 100644
--- a/calibre.spec
+++ b/calibre.spec
@@ -1,5 +1,5 @@
 Name:          calibre
-Version:       4.20.0
+Version:       4.21.0
 Release:       1mamba
 Summary:       A free and open source e-book library management application
 Group:         Graphical Desktop/Applications/Multimedia
@@ -189,6 +189,9 @@ CALIBRE_PY3_PORT=1 %{__python3} setup.py install \
 %{python3_sitelib}/init_calibre.py
 
 %changelog
+* Fri Jul 17 2020 Automatic Build System <autodist@mambasoft.it> 4.21.0-1mamba
+- automatic version update by autodist
+
 * Fri Jul 03 2020 Automatic Build System <autodist@mambasoft.it> 4.20.0-1mamba
 - automatic version update by autodist