diff --git a/python-acme.spec b/python-acme.spec
index da3ca38..b97f0ca 100644
--- a/python-acme.spec
+++ b/python-acme.spec
@@ -1,5 +1,5 @@
 Name:          python-acme
-Version:       0.20.0
+Version:       0.21.0
 Release:       1mamba
 Summary:       ACME protocol implementation for Python
 Group:         System/Libraries
@@ -50,6 +50,9 @@ python setup.py nosetests
 %{python_sitearch}/acme-%{version}-py*.egg-info/*
 
 %changelog
+* Thu Jan 18 2018 Automatic Build System <autodist@mambasoft.it> 0.21.0-1mamba
+- automatic version update by autodist
+
 * Mon Dec 25 2017 Automatic Build System <autodist@mambasoft.it> 0.20.0-1mamba
 - automatic version update by autodist