diff --git a/cantor.spec b/cantor.spec
index 0e4860c..c9b2d7f 100644
--- a/cantor.spec
+++ b/cantor.spec
@@ -1,5 +1,5 @@
 Name:          cantor
-Version:       21.04.0
+Version:       21.04.1
 Release:       1mamba
 Summary:       KDE Frontend to Mathematical Software
 Group:         Graphical Desktop/Applications/Educational
@@ -149,6 +149,9 @@ exit 0
 %{_libdir}/cmake/Cantor/Cantor*.cmake
 
 %changelog
+* Thu May 13 2021 Automatic Build System <autodist@mambasoft.it> 21.04.1-1mamba
+- automatic version update by autodist
+
 * Fri Apr 23 2021 Automatic Build System <autodist@mambasoft.it> 21.04.0-1mamba
 - automatic version update by autodist