diff --git a/desktop-base-kde.spec b/desktop-base-kde.spec
index e74a630..698392e 100644
--- a/desktop-base-kde.spec
+++ b/desktop-base-kde.spec
@@ -14,7 +14,7 @@
 
 Name:          desktop-base-kde
 Version:       5.4
-Release:       3mamba
+Release:       4mamba
 Summary:       KDE default desktop theme and menu entries for openmamba
 Group:         Graphical Desktop/Applications/Environment
 Vendor:        openmamba
@@ -216,6 +216,8 @@ Obsoletes:     libblogilo <= 17.08.3
 Obsoletes:     libblogilo-devel <= 17.08.3
 Obsoletes:     libkolab <= 1.0.2
 Obsoletes:     libkolab-devel <= 1.0.2
+Obsoletes:     kdelibs3 <= 3.5.10
+Obsoletes:     kdelibs3-devel <= 3.5.10
 
 %description
 KDE default desktop theme and menu entries providing with various desktop related scripts and configuration files.
@@ -266,6 +268,9 @@ fi
 %doc gpl.txt
 
 %changelog
+* Sun Aug 20 2023 Silvan Calarco <silvan.calarco@mambasoft.it> 5.4-4mamba
+- obsolete kdelibs3
+
 * Fri May 05 2023 Silvan Calarco <silvan.calarco@mambasoft.it> 5.4-3mamba
 - obsolete blogilo, libblogilo and libkolab