diff --git a/data/mntner/GRASSBLOCK-MNT b/data/mntner/GRASSBLOCK-MNT
index aa33ce464..488160d1c 100644
--- a/data/mntner/GRASSBLOCK-MNT
+++ b/data/mntner/GRASSBLOCK-MNT
@@ -4,5 +4,5 @@ tech-c:             GRASSBLOCK-DN42
 mnt-by:             GRASSBLOCK-MNT
 source:             DN42
 auth:               pgp-fingerprint E51BC7D3266D37BB65B54EED4A1234D8D19B0427
-auth:               ssh-ed25519sk AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIB4SjaSuVxzC/+kL2PTA34WkQbmznBEI+B4J0quzfCf8AAAABHNzaDo=
+auth:               sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIB4SjaSuVxzC/+kL2PTA34WkQbmznBEI+B4J0quzfCf8AAAABHNzaDo=
 remarks:            /dev/random