diff --git a/unattended-upgrades.sh b/unattended-upgrades.sh
index 323ef53..e064301 100644
--- a/unattended-upgrades.sh
+++ b/unattended-upgrades.sh
@@ -25,17 +25,17 @@ apt-get dist-upgrade -y
 apt-get install -y unattended-upgrades apt-listchanges
 
 # configure 50unattended-upgrades
-sed -i -e '
-s/        "origin=Debian,codename=${distro_codename},label=Debian-Security";/\/\/      "origin=Debian,codename=${distro_codename},label=Debian-Security";\n        "o=*";/g
-s/\/\/Unattended-Upgrade::AutoFixInterruptedDpkg "false"/Unattended-Upgrade::AutoFixInterruptedDpkg "true"/g
-s/\/\/Unattended-Upgrade::MinimalSteps "true"/Unattended-Upgrade::MinimalSteps "true"/g
-s/\/\/Unattended-Upgrade::InstallOnShutdown "true"/Unattended-Upgrade::InstallOnShutdown "false"/g
-s/\/\/Unattended-Upgrade::Mail "root"/Unattended-Upgrade::Mail "root"/g
-s/\/\/Unattended-Upgrade::MailOnlyOnError "true"/Unattended-Upgrade::MailOnlyOnError "true"/g
-s/\/\/Unattended-Upgrade::Remove-Unused-Dependencies "false"/Unattended-Upgrade::Remove-Unused-Dependencies "true"/g
-s/\/\/Unattended-Upgrade::Automatic-Reboot "false"/Unattended-Upgrade::Automatic-Reboot "true"/g
-s/\/\/Unattended-Upgrade::Automatic-Reboot-Time "02:00"/Unattended-Upgrade::Automatic-Reboot-Time "02:00"/g
-' /etc/apt/apt.conf.d/50unattended-upgrades
+sed -r -i -e "
+s/        \"origin=Debian,(\\S+),label=Debian-Security\";/\/\/      \"origin=Debian,\\1,label=Debian-Security\";\n        \"o=*\";/g
+s/\/\/Unattended-Upgrade::AutoFixInterruptedDpkg \"false\"/Unattended-Upgrade::AutoFixInterruptedDpkg \"true\"/g
+s/\/\/Unattended-Upgrade::MinimalSteps \"true\"/Unattended-Upgrade::MinimalSteps \"true\"/g
+s/\/\/Unattended-Upgrade::InstallOnShutdown \"true\"/Unattended-Upgrade::InstallOnShutdown \"false\"/g
+s/\/\/Unattended-Upgrade::Mail \"root\"/Unattended-Upgrade::Mail \"root\"/g
+s/\/\/Unattended-Upgrade::MailOnlyOnError \"true\"/Unattended-Upgrade::MailOnlyOnError \"true\"/g
+s/\/\/Unattended-Upgrade::Remove-Unused-Dependencies \"false\"/Unattended-Upgrade::Remove-Unused-Dependencies \"true\"/g
+s/\/\/Unattended-Upgrade::Automatic-Reboot \"false\"/Unattended-Upgrade::Automatic-Reboot \"true\"/g
+s/\/\/Unattended-Upgrade::Automatic-Reboot-Time \"02:00\"/Unattended-Upgrade::Automatic-Reboot-Time \"02:00\"/g
+" /etc/apt/apt.conf.d/50unattended-upgrades
 
 # configure 02periodic
 cat > /etc/apt/apt.conf.d/02periodic <<EOL