diff --git a/Create-DevTerm-A06-OS-image-from-scratch.md b/Create-DevTerm-A06-OS-image-from-scratch.md
index b08bf77..1295880 100644
--- a/Create-DevTerm-A06-OS-image-from-scratch.md
+++ b/Create-DevTerm-A06-OS-image-from-scratch.md
@@ -90,7 +90,7 @@ EOF'
 ### additional software
 ```
 sudo apt remove celluloid mpv 
-sudo apt install -y arandr chromium-browser vlc cpupower-gui
+sudo apt install -y arandr chromium-browser vlc cpupower-gui xfce4-power-manager
 ```
 ### /etc/default/apport 
 `enable=0`