diff --git a/setup/preflight.sh b/setup/preflight.sh
index f7a99941..54fcd6c9 100644
--- a/setup/preflight.sh
+++ b/setup/preflight.sh
@@ -7,9 +7,9 @@ if [[ $EUID -ne 0 ]]; then
 	exit
 fi
 
-# Check that we are running on Ubuntu 14.04 LTS (or 14.04.xx).
+# Check that we are running on Ubuntu 18.04 LTS (or 18.04.xx).
 if [ "`lsb_release -d | sed 's/.*:\s*//' | sed 's/18\.04\.[0-9]/18.04/' `" != "Ubuntu 18.04 LTS" ]; then
-	echo "Mail-in-a-Box only supports being installed on Ubuntu 14.04, sorry. You are running:"
+	echo "Mail-in-a-Box only supports being installed on Ubuntu 18.04, sorry. You are running:"
 	echo
 	lsb_release -d | sed 's/.*:\s*//'
 	echo