diff --git a/files/bashscripts/debian/debian-setup-unattended-upgrades.sh b/files/bashscripts/debian/debian-setup-unattended-upgrades.sh
index 70be561..0b90acb 100644
--- a/files/bashscripts/debian/debian-setup-unattended-upgrades.sh
+++ b/files/bashscripts/debian/debian-setup-unattended-upgrades.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-isInFile=$(cat /etc/postfix/main.cf | grep -c 'APT::Periodic::Unattended-Upgrade "1";')
+isInFile=$(cat /etc/apt/apt.conf.d/20auto-upgrades | grep -c 'APT::Periodic::Unattended-Upgrade "1";')
 if [ $isInFile -eq 0 ]
     then
         apt install -y apt-listchanges unattended-upgrades