diff --git a/README.md b/README.md
index b048c2a..ea68ea2 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ host key and an authorized keys file. Assuming you mounted the
 permanent file system at `/media/sdx4`:
 
 ```
-sudo ssh-keygen -N '' -t rsa -f /media/sdx4/breakglass.host_key
+sudo ssh-keygen -N '' -t ed25519 -f /media/sdx4/breakglass.host_key
 sudo install -m 600 ~/.ssh/id_*.pub /media/sdx4/breakglass.authorized_keys
 ```