diff --git a/install.sh b/install.sh
index f926516..3c023ae 100755
--- a/install.sh
+++ b/install.sh
@@ -127,7 +127,7 @@ sed -i "s|example.com|$maildomain|g" /etc/exim4/exim_local.conf
 touch /etc/exim4/srsd.secret
 chmod 640 /etc/exim4/srsd.secret
 chown Debian-exim:Debian-exim /etc/exim4/srsd.secret
-pwgen -N 1 -cny 64 > /etc/exim4/srsd.secret
+pwgen -N 1 64 > /etc/exim4/srsd.secret
 sed -i "s|^QUEUERUNNER.*|QUEUERUNNER='separate'|g" /etc/default/exim4
 sed -i "s|^QUEUEINTERVAL.*|QUEUEINTERVAL='15m'|g" /etc/default/exim4