diff --git a/flake.nix b/flake.nix
index a2a822f..2841638 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,13 +1,13 @@
 {
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05-small";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11-small";
     nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable-small";
     nixpkgs-master.url = "github:NixOS/nixpkgs/master";
     nixos-generators = {
       url = "github:nix-community/nixos-generators";
       inputs.nixpkgs.follows = "nixpkgs";
     };
-    simple-nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-25.05";
+    simple-nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-25.11";
   };
 
   outputs = { self, nixpkgs, nixpkgs-unstable, nixpkgs-master, nixos-generators, simple-nixos-mailserver, ... }@inputs: