diff --git a/kdesdk-thumbnailers.spec b/kdesdk-thumbnailers.spec
index c361135..d16c0ff 100644
--- a/kdesdk-thumbnailers.spec
+++ b/kdesdk-thumbnailers.spec
@@ -1,5 +1,5 @@
 Name:          kdesdk-thumbnailers
-Version:       20.12.3
+Version:       21.04.0
 Release:       1mamba
 Summary:       A plugin to allow KDE software to create thumbnails for Gettext translations files (po)
 Group:         Graphical Desktop/Applications/Development
@@ -12,8 +12,16 @@ License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: gettext-devel
 BuildRequires: glibc-devel
-BuildRequires: kdelibs-devel
 BuildRequires: libgcc
+BuildRequires: libkcompletion-devel
+BuildRequires: libkconfig-devel
+BuildRequires: libkcoreaddons-devel
+BuildRequires: libki18n-devel
+BuildRequires: libkio-devel
+BuildRequires: libkjobwidgets-devel
+BuildRequires: libkservice-devel
+BuildRequires: libkwidgetsaddons-devel
+BuildRequires: libkwindowsystem-devel
 BuildRequires: libqt5-devel
 BuildRequires: libstdc++6-devel
 ## AUTOBUILDREQ-END
@@ -51,6 +59,9 @@ This package is part of the KDE Software Development Kit module.
 %doc COPYING
 
 %changelog
+* Thu Apr 22 2021 Automatic Build System <autodist@mambasoft.it> 21.04.0-1mamba
+- automatic version update by autodist
+
 * Fri Mar 05 2021 Automatic Build System <autodist@mambasoft.it> 20.12.3-1mamba
 - automatic version update by autodist