diff --git a/startup.sh b/startup.sh
index 9fbc3d9..457d553 100644
--- a/startup.sh
+++ b/startup.sh
@@ -1,4 +1,5 @@
 envsubst < /etc/sssd/sssd.conf.env > /etc/sssd/sssd.conf
+chmod 600 /etc/sssd/sssd.conf
 
 rm -rf /var/run/sssd.pid
 /usr/sbin/sssd -f