diff --git a/python-tornado.spec b/python-tornado.spec
index 97372bf..427ae8f 100644
--- a/python-tornado.spec
+++ b/python-tornado.spec
@@ -1,5 +1,5 @@
 Name:          python-tornado
-Version:       4.5.2
+Version:       4.5.3
 Release:       1mamba
 Summary:       Scalable, non-blocking web server and tools
 Group:         System/Libraries
@@ -43,6 +43,9 @@ CFLAGS="%{optflags}" %{__python} setup.py build
 %doc LICENSE README.rst
 
 %changelog
+* Wed Feb 28 2018 Automatic Build System <autodist@mambasoft.it> 4.5.3-1mamba
+- automatic version update by autodist
+
 * Wed Aug 30 2017 Automatic Build System <autodist@mambasoft.it> 4.5.2-1mamba
 - automatic version update by autodist