Explain where certificates will come from

README.md

@@ -54,8 +54,10 @@ What You’ll Need
 
 1.  A VPS (or bare-metal server if you wanna ball hard). My VPS is hosted at [Linode](http://www.linode.com/?r=45405878277aa04ee1f1d21394285da6b43f963b). You’ll probably want at least 512 MB of RAM between Apache, Solr, and PostgreSQL. Mine has 1024.
 2.  [64-bit Debian 7](http://www.debian.org/) or an equivalent Linux distribution. (You can use whatever distro you want, but deviating from Debian will require more tweaks to the playbooks. See Ansible’s different [packaging](http://docs.ansible.com/ansible/list_of_packaging_modules.html) modules.)
-3.  A wildcard SSL certificate. You can either buy one or self-sign if you want to save money.
-4.  A [Tarsnap](http://www.tarsnap.com) account with some credit in it. You could comment this out if you want to use a different backup service. Consider paying your hosting provider for backups or using an additional backup service for redundancy.
+3.  A [Tarsnap](http://www.tarsnap.com) account with some credit in it. You could comment this out if you want to use a different backup service. Consider paying your hosting provider for backups or using an additional backup service for redundancy.
+
+You do not need to acquire an SSL certificate.  The SSL certificates you need will be obtained from [Let's Encrypt](https://letsencrypt.org/) automatically when you deploy your server.
+
 
 Installation
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