diff --git a/README.md b/README.md
index ea5d78a..c1ad26b 100644
--- a/README.md
+++ b/README.md
@@ -104,6 +104,7 @@ If you want me to be able to hop on your machines to debug stuff please add my S
 ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPrw78OSJACq5MFXHrhAr2bPpnTNxwLE85mzij8gKmCs thomas@thonkpad
 ```
 
+:warning: Before the first run of Ansible, if you don't have your SSH key installed on the machine, put it inside the `/root/.ssh/authorized_keys` file inside *both* your VMs, and `chmod 500` the file.
 
 ### One more thing, update your inventory