diff --git a/setup/dns.sh b/setup/dns.sh
index 770e1604..55528a0a 100644
--- a/setup/dns.sh
+++ b/setup/dns.sh
@@ -68,7 +68,7 @@ cat > /etc/cron.daily/mailinabox-dnssec << EOF;
 #!/bin/bash
 # Mail-in-a-Box
 # Re-sign any DNS zones with DNSSEC because the signatures expire periodically.
-curl -d GO http://localhost:10222/dns/update
+curl -d GO --user \$(</var/lib/mailinabox/api.key): http://localhost:10222/dns/update
 EOF
 chmod +x /etc/cron.daily/mailinabox-dnssec
 
diff --git a/setup/start.sh b/setup/start.sh
index 0477b7a5..cb92c724 100755
--- a/setup/start.sh
+++ b/setup/start.sh
@@ -133,8 +133,8 @@ EOF
 
 # Write the DNS and nginx configuration files.
 sleep 5 # wait for the daemon to start
-curl -s -d POSTDATA http://127.0.0.1:10222/dns/update
-curl -s -d POSTDATA http://127.0.0.1:10222/web/update
+curl -s -d POSTDATA --user $(</var/lib/mailinabox/api.key): http://127.0.0.1:10222/dns/update
+curl -s -d POSTDATA --user $(</var/lib/mailinabox/api.key): http://127.0.0.1:10222/web/update
 
 # If there aren't any mail users yet, create one.
 if [ -z "`tools/mail.py user`" ]; then