diff --git a/machines/hackens-milieu/users.nix b/machines/hackens-milieu/users.nix
index 9899573..7564ae1 100644
--- a/machines/hackens-milieu/users.nix
+++ b/machines/hackens-milieu/users.nix
@@ -8,6 +8,7 @@ let
     ../../pubkeys/soyouzpanda.keys
     ../../pubkeys/catvayor.keys
     ../../pubkeys/sel.keys
+    ../../pubkeys/cst1.keys
   ];
 in
 {
diff --git a/pubkeys/cst1.keys b/pubkeys/cst1.keys
new file mode 100644
index 0000000..a405616
--- /dev/null
+++ b/pubkeys/cst1.keys
@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKrijwPlb7KQkYPLznMPVzPPT69cLzhEsJzZi9tmxzTh cst1@x270