diff --git a/kbruch.spec b/kbruch.spec
index 1c95001..d974297 100644
--- a/kbruch.spec
+++ b/kbruch.spec
@@ -1,5 +1,5 @@
 Name:          kbruch
-Version:       20.12.2
+Version:       20.12.3
 Release:       1mamba
 Summary:       Exercise Fractions
 Group:         Graphical Desktop/Applications/Educational
@@ -19,7 +19,6 @@ BuildRequires: libstdc++6-devel
 #Requires:      kde-workspace
 Provides:      kbruch4 = %{?epoch:%epoch:}%{version}-%{release}
 Obsoletes:     kbruch4
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 KBruch is a small program to practice calculating with fractions and percentages.
@@ -78,6 +77,9 @@ 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