diff --git a/calibre.spec b/calibre.spec
index 3dfd3c2..63c2692 100644
--- a/calibre.spec
+++ b/calibre.spec
@@ -1,5 +1,5 @@
 Name:          calibre
-Version:       3.20.0
+Version:       3.21.0
 Release:       1mamba
 Summary:       A free and open source e-book library management application
 Group:         Graphical Desktop/Applications/Multimedia
@@ -195,6 +195,9 @@ install -D -m0644 %{buildroot}%{_datadir}/calibre/content-server/calibre.png \
 %{python27_sitelib}/init_calibre.py
 
 %changelog
+* Fri Apr 06 2018 Automatic Build System <autodist@mambasoft.it> 3.21.0-1mamba
+- automatic version update by autodist
+
 * Fri Mar 23 2018 Automatic Build System <autodist@mambasoft.it> 3.20.0-1mamba
 - automatic version update by autodist