diff --git a/nixbld-etc-nixos/configuration.nix b/nixbld-etc-nixos/configuration.nix
index d523da7..cffd3de 100644
--- a/nixbld-etc-nixos/configuration.nix
+++ b/nixbld-etc-nixos/configuration.nix
@@ -18,8 +18,8 @@ in
       ./backup-module.nix
       ./flarum.nix
       (builtins.fetchTarball {
-        url = "https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/archive/nixos-20.09/nixos-mailserver-nixos-20.09.tar.gz";
-        sha256 = "1cfzlfdfiw8347cgi0y4akj528lpwplhdpq3fv5rw7fb1zq2w6ib";
+        url = "https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/archive/fb1cc04c0a517d4200237b02c3472bcaf9104afb/nixos-mailserver-nixos.tar.gz";
+        sha256 = "0vsvgxxg5cgmzwj98171j7h5l028f1yq784alb3lxgbk8znfk51y";
       })
     ];