diff --git a/boxes/common/install-salt b/boxes/common/install-salt
index b982117..701f99e 100755
--- a/boxes/common/install-salt
+++ b/boxes/common/install-salt
@@ -5,6 +5,7 @@ set -e
 rootfs=$1
 
 echo "installing salt"
+chroot $rootfs apt-get install python-software-properties -y --force-yes
 chroot $rootfs apt-add-repository -y ppa:saltstack/salt
 chroot $rootfs apt-get update
 chroot $rootfs apt-get install salt-minion -y --force-yes