diff --git a/umbrello.spec b/umbrello.spec
index c8fadd4..51e5f99 100644
--- a/umbrello.spec
+++ b/umbrello.spec
@@ -1,5 +1,5 @@
 Name:          umbrello
-Version:       20.12.2
+Version:       20.12.3
 Release:       1mamba
 Summary:       UML modelling tool and code generator
 Group:         Graphical Desktop/Applications/Development
@@ -50,7 +50,6 @@ BuildRequires: automoc4
 BuildRequires: cmake
 Provides:      umbrello4
 Obsoletes:     umbrello4
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 UML modelling tool and code generator. This package is part of KDE4.
@@ -112,6 +111,9 @@ exit 0
 %doc AUTHORS COPYING COPYING.DOC THANKS
 
 %changelog
+* Sat Mar 06 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