diff --git a/instances/heimdall/configuration.nix b/instances/heimdall/configuration.nix
index 11bb8be..2ded5c4 100644
--- a/instances/heimdall/configuration.nix
+++ b/instances/heimdall/configuration.nix
@@ -105,7 +105,7 @@ in
         permit_join = true;
         serial = {
           port = "/dev/serial/by-id/usb-1a86_USB_Serial-if00-port0";
-          adapter = "zstack";
+          adapter = "ember";
         };
       };
     };