diff --git a/knetwalk.spec b/knetwalk.spec
index 5ebf269..f7c4429 100644
--- a/knetwalk.spec
+++ b/knetwalk.spec
@@ -1,5 +1,5 @@
 Name:          knetwalk
-Version:       20.12.2
+Version:       20.12.3
 Release:       1mamba
 Summary:       Network Construction Game
 Group:         Graphical Desktop/Applications/Games
@@ -16,7 +16,6 @@ BuildRequires: libqt5-devel
 BuildRequires: libstdc++6-devel
 ## AUTOBUILDREQ-END
 BuildRequires: cmake
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 Network Construction Game.
@@ -69,6 +68,9 @@ exit 0
 %doc AUTHORS COPYING COPYING.DOC
 
 %changelog
+* Fri Mar 05 2021 Automatic Build System <autodist@mambasoft.it> 20.12.3-1mamba
+- automatic version update by autodist
+
 * Fri Feb 05 2021 Automatic Build System <autodist@mambasoft.it> 20.12.2-1mamba
 - automatic version update by autodist