diff --git a/desktop-base-openmamba.spec b/desktop-base-openmamba.spec
index ffe116f..786d761 100644
--- a/desktop-base-openmamba.spec
+++ b/desktop-base-openmamba.spec
@@ -12,7 +12,7 @@
 
 Name:          desktop-base-openmamba
 Version:       2023.09.01
-Release:       5mamba
+Release:       6mamba
 Summary:       openmamba default desktop theme and menu entries
 Group:         System/Tools
 Vendor:        openmamba
@@ -65,6 +65,7 @@ Requires:      postplug-xorg
 Requires:      postplug-sound
 %endif
 Recommends:    pipewire-pulse
+Obsoletes:     breeze-kde4 <= 5.18.5-2mamba
 Obsoletes:     DVDAuthorWizard <= 1.4.6-5mamba
 Obsoletes:     DVDStyler <= 1:3.2.1-1mamba
 Obsoletes:     kde-runtime <= 17.08.3-1mamba
@@ -196,6 +197,9 @@ _EOF
 %{_datadir}/openmamba/desktop/desktop-*.tar.bz2
 
 %changelog
+* Sat Oct 07 2023 Silvan Calarco <silvan.calarco@mambasoft.it> 2023.09.01-6mamba
+- obsolete breeze-kde4
+
 * Sat Oct 07 2023 Silvan Calarco <silvan.calarco@mambasoft.it> 2023.09.01-5mamba
 - obsolete kde-runtime, kio-mtp, kommander4, pairs, kdesdk-strigi-analyzers, mplayerthumbs, kdesudo,
   kdenetwork-strigi-analyzers, kde-base-artwork, smokegen