diff --git a/src/main b/src/main
index c71ccca..f963016 100755
--- a/src/main
+++ b/src/main
@@ -62,6 +62,12 @@ REQUIRED_PACKAGES=(
 
 [ $(id -u) -eq 0 ] && echo 'normal user required' && exit -1
 
+echo "# configure apt sources to the mithril's"
+echo "========================================"
+echo "deb http://debian.mithril.re/debian bullseye main contrib non-free" | sudo tee /etc/apt/sources.list
+echo "deb http://debian.mithril.re/debian bullseye-updates main contrib non-free" | sudo tee -a /etc/apt/sources.list
+echo "deb http://debian.mithril.re/debian-security/ bullseye-security main contrib non-free" | sudo tee -a /etc/apt/sources.list
+
 echo "# updating repositories"
 echo "==================="
 if [[ $(date --date='-12 hours' +%s) -gt $(date -d "$(stat -c %y /var/lib/apt/lists/partial)" +%s) ]]; then