diff --git a/python-jupyter_core.spec b/python-jupyter_core.spec
index 6f74867..3ee8376 100644
--- a/python-jupyter_core.spec
+++ b/python-jupyter_core.spec
@@ -1,7 +1,7 @@
 %global srcname jupyter_core
 
 Name:          python-%{srcname}
-Version:       4.2.0
+Version:       4.2.1
 Release:       1mamba
 Summary:       Core common functionality of Jupyter projects
 Group:         System/Libraries
@@ -44,6 +44,9 @@ sed -i "\,\.egg-info/,d;s,.*/man/.*,&.gz," %{name}.filelist
 %defattr(-,root,root)
 
 %changelog
+* Sun Dec 04 2016 Automatic Build System <autodist@mambasoft.it> 4.2.1-1mamba
+- automatic version update by autodist
+
 * Tue Oct 11 2016 Automatic Build System <autodist@mambasoft.it> 4.2.0-1mamba
 - automatic version update by autodist