diff --git a/README.md b/README.md
index bd8c81f..c7187e5 100644
--- a/README.md
+++ b/README.md
@@ -2,19 +2,20 @@
 
 A demo [Drupal] application for demonstrating PHP application deployment with [Ansible][], [Ansible Vault][] and [Ansistrano][].
 
+[Ansible]: https://www.ansible.com
+[Ansible Vault]: https://docs.ansible.com/ansible/ansible-vault.html
+[Ansistrano]: https://ansistrano.com
+[Drupal]: https://drupal.org
+
 ## Prerequisites
 
 - [Ansible][]
 - [Vagrant][]
 - [VirtualBox][]
 
+[Vagrant]: https://www.vagrantup.com
+[VirtualBox]: https://www.virtualbox.or
+
 ## Installation
 
 See [installation.md](docs/installation.md)
-
-[Ansible]: https://www.ansible.com
-[Ansible Vault]: https://docs.ansible.com/ansible/ansible-vault.html
-[Ansistrano]: https://ansistrano.com
-[Drupal]: https://drupal.org
-[Vagrant]: https://www.vagrantup.com
-[VirtualBox]: https://www.virtualbox.org