diff --git a/kdesdk-thumbnailers.spec b/kdesdk-thumbnailers.spec
index bd86031..9c406df 100644
--- a/kdesdk-thumbnailers.spec
+++ b/kdesdk-thumbnailers.spec
@@ -1,5 +1,5 @@
 Name:          kdesdk-thumbnailers
-Version:       21.08.3
+Version:       21.12.0
 Release:       1mamba
 Summary:       A plugin to allow KDE software to create thumbnails for Gettext translations files (po)
 Group:         Graphical Desktop/Applications/Development
@@ -23,9 +23,9 @@ BuildRequires: libkjobwidgets-devel
 BuildRequires: libkservice-devel
 BuildRequires: libkwidgetsaddons-devel
 BuildRequires: libkwindowsystem-devel
-BuildRequires: libqt5-devel
 BuildRequires: libsolid-devel
 BuildRequires: libstdc++6-devel
+BuildRequires: qt5-qtbase-devel
 ## AUTOBUILDREQ-END
 BuildRequires: automoc4
 BuildRequires: cmake
@@ -61,6 +61,9 @@ This package is part of the KDE Software Development Kit module.
 %doc LICENSES
 
 %changelog
+* Thu Dec 09 2021 Automatic Build System <autodist@mambasoft.it> 21.12.0-1mamba
+- automatic version update by autodist
+
 * Thu Nov 04 2021 Automatic Build System <autodist@mambasoft.it> 21.08.3-1mamba
 - automatic version update by autodist