diff --git a/flake.nix b/flake.nix
index 0f3328c..3dd6ce8 100644
--- a/flake.nix
+++ b/flake.nix
@@ -43,7 +43,7 @@
       url = "github:fort-nix/nix-bitcoin/release";
     };
     simple-nixos-mailserver = {
-      url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-22.11";
+      url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-24.11";
     };
     nixos-cosmic = {
       url = "github:lilyinstarlight/nixos-cosmic";