diff --git a/python-singledispatch.spec b/python-singledispatch.spec
index d8ecfd9..b647a34 100644
--- a/python-singledispatch.spec
+++ b/python-singledispatch.spec
@@ -1,6 +1,6 @@
 Name:          python-singledispatch
 Version:       3.4.0.3
-Release:       1mamba
+Release:       2mamba
 Summary:       This library brings functools.singledispatch from Python 3.4 to Python 2.6
 Group:         System/Libraries
 Vendor:        openmamba
@@ -13,6 +13,7 @@ License:       MIT
 BuildRequires: libpython-devel
 ## AUTOBUILDREQ-END
 Requires:      python >= %python_version
+Requires:      python-six
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
@@ -40,5 +41,8 @@ sed -i "s,.*/man/.*,&.gz," %{name}.filelist
 %doc README.rst
 
 %changelog
+* Sat Aug 10 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 3.4.0.3-2mamba
+- require python-six
+
 * Sat Jan 23 2016 Davide Madrisan <davide.madrisan@gmail.com> 3.4.0.3-1mamba
 - package created using the webbuild interface