diff --git a/slib.spec b/slib.spec
index 9fe1cf7..7f9441a 100644
--- a/slib.spec
+++ b/slib.spec
@@ -1,5 +1,5 @@
 Name:          slib
-Version:       3b6
+Version:       3b7
 Release:       1mamba
 Summary:       platform independent library for scheme
 Group:         Development/Tools
@@ -15,7 +15,6 @@ License:       MIT
 Requires(post): umb-scheme
 Requires(post): %{__install_info}
 Requires(post): libguile-tools
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 "SLIB" is a portable library for the programming language Scheme.
@@ -89,6 +88,9 @@ exit 0
 #%doc ANNOUNCE README FAQ ChangeLog
 
 %changelog
+* Mon Oct 31 2022 Automatic Build System <autodist@mambasoft.it> 3b7-1mamba
+- automatic version update by autodist
+
 * Sat Jan 30 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 3b6-1mamba
 - update to 3b6