-deb http://us.archive.ubuntu.com/ubuntu/ bionic main
-deb http://us.archive.ubuntu.com/ubuntu/ bionic-updates main
-deb http://us.archive.ubuntu.com/ubuntu/ bionic-security main
-deb-src http://us.archive.ubuntu.com/ubuntu/ bionic main
-deb-src http://us.archive.ubuntu.com/ubuntu/ bionic-updates main
-deb-src http://us.archive.ubuntu.com/ubuntu/ bionic-security main
+deb http://us.archive.ubuntu.com/ubuntu/ bionic main universe
+deb http://us.archive.ubuntu.com/ubuntu/ bionic-updates main universe
+deb http://us.archive.ubuntu.com/ubuntu/ bionic-security main universe
+deb-src http://us.archive.ubuntu.com/ubuntu/ bionic main universe
+deb-src http://us.archive.ubuntu.com/ubuntu/ bionic-updates main universe
+deb-src http://us.archive.ubuntu.com/ubuntu/ bionic-security main universe