diff --git a/kmplot.spec b/kmplot.spec
index 28fc903..731877f 100644
--- a/kmplot.spec
+++ b/kmplot.spec
@@ -1,5 +1,5 @@
 Name:          kmplot
-Version:       20.12.2
+Version:       20.12.3
 Release:       1mamba
 Summary:       Mathematical Function Plotter
 Group:         Graphical Desktop/Applications/Educational
@@ -20,7 +20,6 @@ BuildRequires: cmake
 #Requires:      kde-workspace
 Provides:      kmplot4 = %{?epoch:%epoch:}%{version}-%{release}
 Obsoletes:     kmplot4
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 KmPlot is a program to draw graphs, their integrals or derivatives.
@@ -121,6 +120,9 @@ exit 0
 #TODO
 
 %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