diff --git a/install_debian.sh b/install_debian.sh
index 9f0f352..8d8f165 100755
--- a/install_debian.sh
+++ b/install_debian.sh
@@ -2,8 +2,9 @@
 # install packages I need
 sudo apt update
 sudo apt install -y nala
-sudo nala install -y \
+sudo apt install -y \
 xorg                         `# for graphics` \
+x11-xserver-utils            `# for graphics` \
 make                         `# for compiling gui` \
 gcc                          `# for compiling gui` \
 libx11-dev                   `# for compiling dwm` \
@@ -15,7 +16,7 @@ suckless-tools               `# for dmenu` \
 ncdu                         `# for disk usage analysys` \
 brightnessctl                `# for keyboard backlight` \
 xcompmgr                     `# for st opacity` \
-gnome-backgrounds            `# for background` \
+mate-backgrounds             `# for background` \
 xwallpaper                   `# for background` \
 pulseaudio                   `# for sound` \
 pavucontrol                  `# for audio control` \
@@ -26,8 +27,7 @@ surf                         `# suckless lightweight browser` \
 micro                        `# console editor` \
 neovim                       `# console editor` \
 psmisc                       `# pstree etc.` \
-slack \
-firefox \
+chromium \
 python3 \
 python3-venv 
 
@@ -63,7 +63,8 @@ do
   fi  
 done
 
-echo dwm > ~/.xinitrc  # for starting dwm when startx
+echo 'dbus-update-activation-environment --systemd DBUS_SESSION_BUS_ADDRESS DISPLAY XAUTHORITY &' > ~/.xinitrc  # because of slow Telegram start
+echo dwm >> ~/.xinitrc  # for starting dwm when startx
 
 for tool in create_systemd_service.py create_systemd_timer.py set_brightness.sh update_gui.sh
 do    
@@ -85,8 +86,8 @@ then
 fi  
 echo "xhost +local:" > $HOME/.dwm/autostart.sh # give permissions to display
 echo "xcompmgr &" >> $HOME/.dwm/autostart.sh  # for st opacity
-echo "xwallpaper --stretch /usr/share/backgrounds/Blue_flower_by_Elena_Stravoravdi.jpg" >> $HOME/.dwm/autostart.sh  # background
-echo "firefox &" >> $HOME/.dwm/autostart.sh
+echo "xwallpaper --stretch /usr/share/backgrounds/mate/nature/Dune.jpg" >> $HOME/.dwm/autostart.sh  # background
+echo "chromium &" >> $HOME/.dwm/autostart.sh
 echo "Telegram &" >> $HOME/.dwm/autostart.sh
 echo "st &" >> $HOME/.dwm/autostart.sh
 echo "pasystray &" >> $HOME/.dwm/autostart.sh