diff --git a/README.md b/README.md
index 02e0019..5b7be0b 100644
--- a/README.md
+++ b/README.md
@@ -18,9 +18,12 @@ Currently, the playbook will:
 * You already have a VPS running and DNS records pointing your desired domain at it.
 * You have a valid SSH key for your root user configured in your SSH agent.
 * You have Ansible installed and are reasonably familiar with it.
+* You have a valid, licensed copy of the Foundry VTT server software in a zip file on your local machine
 
 ## Steps
 
 Create a copy of the example variables file `cp variables.yml.example variables.yml` and change the domain name to the correct value.
 
+Make sure the Foundry zip file is in the root of this project and called `foundryvtt.zip`.
+
 Run the playbook against your server, e.g. `ansible-playbook foundry_playbook.yml -i vtt.vidja.social,` (Note the comma after the domain, this tells ansible it's an address and not an inventory file).