diff --git a/docs/flakes.nix b/docs/flakes.nix
index a74bdfa..5e0d0e7 100644
--- a/docs/flakes.nix
+++ b/docs/flakes.nix
@@ -2,9 +2,9 @@
   description = "NixOS configuration";
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11-small";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-26.05-small";
 
-    simple-nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-25.11";
+    simple-nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-26.05";
     simple-nixos-mailserver.inputs.nixpkgs.follows = "nixpkgs";
   };
 
diff --git a/docs/setup-example.nix b/docs/setup-example.nix
index c2b4dd0..32f62c2 100644
--- a/docs/setup-example.nix
+++ b/docs/setup-example.nix
@@ -10,10 +10,10 @@
       # or flakes.
 
       # URL to the tarball for the release matching your NixOS release
-      url = "https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/archive/nixos-25.11/nixos-mailserver-nixos-25.11.tar.gz";
+      url = "https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/archive/nixos-26.05/nixos-mailserver-nixos-26.05.tar.gz";
 
       # Hash of the unpacked tarball, run the following command to retrieve it
-      # release="nixos-25.11" nix-prefetch-url "https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/archive/${release}/nixos-mailserver-${release}.tar.gz" --unpack
+      # release="nixos-26.05" nix-prefetch-url "https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/archive/${release}/nixos-mailserver-${release}.tar.gz" --unpack
       sha256 = "0000000000000000000000000000000000000000000000000000";
     })
   ];