diff --git a/byacc.spec b/byacc.spec
index 03db6ec..7496db1 100644
--- a/byacc.spec
+++ b/byacc.spec
@@ -1,18 +1,17 @@
 Name:          byacc
-Version:       20210109
+Version:       20210328
 Release:       1mamba
 Summary:       an LALR parser generator.
 Group:         Development/Tools
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
-URL:           http://invisible-island.net/byacc/byacc.html
+URL:           https://invisible-island.net/byacc/byacc.html
 Source:        ftp://ftp.invisible-island.net/byacc/byacc-%{version}.tgz
 License:       Public Domain
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
 ## AUTOBUILDREQ-END
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 Berkeley Yacc (byacc) is generally conceded to be the best yacc variant available. 
@@ -53,6 +52,9 @@ make check
 %doc ACKNOWLEDGEMENTS CHANGES NEW_FEATURES NOTES NO_WARRANTY README
 
 %changelog
+* Mon Mar 29 2021 Automatic Build System <autodist@mambasoft.it> 20210328-1mamba
+- automatic version update by autodist
+
 * Sun Jan 10 2021 Automatic Build System <autodist@mambasoft.it> 20210109-1mamba
 - automatic version update by autodist