diff --git a/README.md b/README.md
index 6b9ef0b..d15ffd9 100644
--- a/README.md
+++ b/README.md
@@ -93,13 +93,15 @@ First, put this in your `configuration.nix`:
 ```
 
 **Note:** Make sure the SSH key specified above does *not* have a
-password, otherwise `nix-build` will give an error along the lines of:
+passphrase, otherwise `nix-build` will give an error along the lines of:
 
 > unable to open SSH connection to
 > 'ssh://your-user-name@aarch64.nixos.community': cannot connect to
 > 'your-user-name@aarch64.nixos.community'; trying other available
 > machines...
 
+You should also avoid keys generated with u2f-devices (f.e. yubikeys) like a sk-ssh-ed25519 since you have to press the presence button for every single package build on a remote server. 
+
 Then run an initial SSH connection as root to setup the trust
 fingerprint:
 
diff --git a/keys/janik b/keys/janik
index 31651c8..f452e34 100644
--- a/keys/janik
+++ b/keys/janik
@@ -1,3 +1 @@
-sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIJ4yq7oHBO2iPs4xj797a//0ypnBr27sSadKUeL2NsK6AAAABHNzaDo= janik@aq0.de
-sk-ssh-ed25519@openssh.com AAAAGnNrLXNzaC1lZDI1NTE5QG9wZW5zc2guY29tAAAAIOYg513QZsVzoyVycXZjg4F3T3+OwtcY3WAhrlfyLgLTAAAABHNzaDo= janik@aq0.de
-ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBLZxVITpJ8xbiCa/u2gjSSIupeiqOnRh+8tFIoVhCON janik@aq0.de
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIHLuKhW4+sDUwT4DJS27VZWFTE0Uq71omTo0q4EMgxzh janik@aq0.de