diff --git a/lxqt-session.spec b/lxqt-session.spec
index 85bc13a..8091af7 100644
--- a/lxqt-session.spec
+++ b/lxqt-session.spec
@@ -1,6 +1,6 @@
 Name:          lxqt-session
 Version:       1.1.0
-Release:       2mamba
+Release:       3mamba
 Summary:       Tools to handle LXQt sessions
 Group:         Graphical Desktop/Applications/Environment
 Vendor:        openmamba
@@ -61,6 +61,17 @@ Requires:      qps
 Requires:      screengrab
 Requires(post): shared-mime-info
 Obsoletes:     lxde <= 1.0-4mamba
+Obsoletes:     lxpanel <= 0.10.1-1mamba
+Obsoletes:     lxde-common <= 0.99.2-2mamba
+Obsoletes:     lxinput <= 0.3.5-1mamba
+Obsoletes:     lxlauncher <= 0.2.5-1mamba
+Obsoletes:     lxsession <= 0.5.5-1mamba
+Obsoletes:     lxsession-edit <= 0.2.0-1mamba
+Obsoletes:     lxterminal <= 0.4.0-1mamba
+Obsoletes:     lxtask <= 0.1.10-1mamba
+Obsoletes:     lxrandr <= 0.3.2-1mamba
+Obsoletes:     lxnm <= 0.2.2-5mamba
+Obsoletes:     lxappearance <= 0.6.3-1mamba
 
 %description
 Tools to handle LXQt sessions.
@@ -122,6 +133,9 @@ update-mime-database /usr/share/mime >/dev/null 2>&1
 %doc AUTHORS LICENSE
 
 %changelog
+* Sat May 07 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 1.1.0-3mamba
+- obsolete most lxde old packages
+
 * Thu Apr 21 2022 Silvan Calarco <silvan.calarco@mambasoft.it> 1.1.0-2mamba
 - lxdm.conf: rename theme kde-plasma to KDE-Plasma