diff --git a/docs/Getting Started/Debian/Debian Buster Root on ZFS.rst b/docs/Getting Started/Debian/Debian Buster Root on ZFS.rst
index 61884c2..75fb9a7 100644
--- a/docs/Getting Started/Debian/Debian Buster Root on ZFS.rst	
+++ b/docs/Getting Started/Debian/Debian Buster Root on ZFS.rst	
@@ -553,6 +553,12 @@ Step 4: System Configuration
      deb http://deb.debian.org/debian buster main contrib
      deb-src http://deb.debian.org/debian buster main contrib
 
+     deb http://security.debian.org/debian-security buster/updates main contrib
+     deb-src http://security.debian.org/debian-security buster/updates main contrib
+
+     deb http://deb.debian.org/debian buster-updates main contrib
+     deb-src http://deb.debian.org/debian buster-updates main contrib
+
    ::
 
      vi /mnt/etc/apt/sources.list.d/buster-backports.list
diff --git a/docs/Getting Started/Debian/Debian Stretch Root on ZFS.rst b/docs/Getting Started/Debian/Debian Stretch Root on ZFS.rst
index 89c11a5..0438524 100644
--- a/docs/Getting Started/Debian/Debian Stretch Root on ZFS.rst	
+++ b/docs/Getting Started/Debian/Debian Stretch Root on ZFS.rst	
@@ -471,6 +471,10 @@ Customize this file if the system is not a DHCP client.
   # vi /mnt/etc/apt/sources.list
   deb http://deb.debian.org/debian stretch main contrib
   deb-src http://deb.debian.org/debian stretch main contrib
+  deb http://security.debian.org/debian-security stretch/updates main contrib
+  deb-src http://security.debian.org/debian-security stretch/updates main contrib
+  deb http://deb.debian.org/debian stretch-updates main contrib
+  deb-src http://deb.debian.org/debian stretch-updates main contrib
 
   # vi /mnt/etc/apt/sources.list.d/stretch-backports.list
   deb http://deb.debian.org/debian stretch-backports main contrib