diff --git a/byacc.spec b/byacc.spec
index ec04e6b..59548bf 100644
--- a/byacc.spec
+++ b/byacc.spec
@@ -1,5 +1,5 @@
 Name:          byacc
-Version:       20211224
+Version:       20220101
 Release:       1mamba
 Summary:       an LALR parser generator.
 Group:         Development/Tools
@@ -52,6 +52,9 @@ make check
 %doc ACKNOWLEDGEMENTS CHANGES NEW_FEATURES NOTES NO_WARRANTY README
 
 %changelog
+* Mon Jan 03 2022 Automatic Build System <autodist@mambasoft.it> 20220101-1mamba
+- automatic version update by autodist
+
 * Sat Dec 25 2021 Automatic Build System <autodist@mambasoft.it> 20211224-1mamba
 - automatic version update by autodist