diff --git a/kmbox.spec b/kmbox.spec
index 670e2ba..afb730f 100644
--- a/kmbox.spec
+++ b/kmbox.spec
@@ -1,7 +1,7 @@
 %define majver %(echo %version | cut -d. -f1-2)
 
 Name:          kmbox
-Version:       20.12.2
+Version:       20.12.3
 Release:       1mamba
 Summary:       KDE Frameworks 5 mailbox library
 Group:         System/Libraries
@@ -23,7 +23,6 @@ BuildRequires: cmake
 BuildRequires: rpm-macros-kde5
 BuildRequires: extra-cmake-modules
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
-BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 
 %description
 KDE Frameworks 5 mailbox library.
@@ -88,6 +87,9 @@ exit 0
 %{_kde5_mkspecsdir}/qt_KMbox.pri
 
 %changelog
+* Fri Mar 05 2021 Automatic Build System <autodist@mambasoft.it> 20.12.3-1mamba
+- automatic version update by autodist
+
 * Sat Feb 06 2021 Automatic Build System <autodist@mambasoft.it> 20.12.2-1mamba
 - automatic version update by autodist