diff --git a/python-cycler.spec b/python-cycler.spec
index 3bd07a3..a94b8a5 100644
--- a/python-cycler.spec
+++ b/python-cycler.spec
@@ -1,6 +1,6 @@
 Name:          python-cycler
 Version:       0.10.0
-Release:       1mamba
+Release:       2mamba
 Summary:       mathplotlib libraty - composable cycles
 Group:         System/Libraries
 Vendor:        openmamba
@@ -12,6 +12,7 @@ License:       BSD
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: libpython-devel
 ## AUTOBUILDREQ-END
+BuildRequires: libpython3-devel >= 3.7.4
 Requires:      python >= %python_version
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
@@ -47,5 +48,8 @@ CFLAGS="%{optflags}" %{__python} setup.py build
 # %doc README.rst
 
 %changelog
+* Thu Aug 08 2019 Silvan Calarco <silvan.calarco@mambasoft.it> 0.10.0-2mamba
+- rebuilt with python3 3.7.4
+
 * Mon Jul 18 2016 Davide Madrisan <davide.madrisan@gmail.com> 0.10.0-1mamba
 - package created by autospec
\ No newline at end of file