Update README TSL cert renewal instructions

README.md

@@ -100,29 +100,15 @@ Then restart the OpenResty service:
 
     $ sudo service openresty restart
 
-#### automate TSL cert renewal
+#### automate TSL cert renewal with cron
-
-##### renew TSL certs
-
-Open crontab:
-
-    $ crontab -e
-
-Add the following line, then save and exit:
-
-    19 4 1 * * /usr/bin/dehydrated --config /var/www/config --cron >/dev/null 2>&1
-
-##### restart service
 
 Open root's crontab:
 
     $ sudo crontab -e
 
-Add the following line:
+Add the following line, then save and exit:
 
-    @monthly /usr/bin/systemctl restart openresty.service
+    19 4 1 * * /usr/bin/dehydrated --config /var/www/config --cron >/dev/null 2>&1 && /usr/bin/systemctl restart openresty.service
-
-Save and exit.
 
 ## gotchas