diff --git a/byacc.spec b/byacc.spec
index 9d0e7a5..f80a794 100644
--- a/byacc.spec
+++ b/byacc.spec
@@ -1,5 +1,5 @@
 Name:          byacc
-Version:       20161202
+Version:       20170201
 Release:       1mamba
 Summary:       an LALR parser generator.
 Group:         Development/Tools
@@ -53,6 +53,9 @@ make check
 %doc ACKNOWLEDGEMENTS CHANGES NEW_FEATURES NOTES NO_WARRANTY README
 
 %changelog
+* Fri Feb 03 2017 Automatic Build System <autodist@mambasoft.it> 20170201-1mamba
+- automatic version update by autodist
+
 * Mon Dec 19 2016 Automatic Build System <autodist@mambasoft.it> 20161202-1mamba
 - automatic version update by autodist