diff --git a/flake.lock b/flake.lock
index a5c0583..8a2cec4 100644
--- a/flake.lock
+++ b/flake.lock
@@ -621,15 +621,16 @@
         "nixpkgs-25_05": "nixpkgs-25_05"
       },
       "locked": {
-        "lastModified": 1748501919,
-        "narHash": "sha256-UcPtnBgdIzsTwmw9MBOtxZsT8MHrVCwO11+04pHRuJU=",
+        "lastModified": 1747965231,
+        "narHash": "sha256-BW3ktviEhfCN/z3+kEyzpDKAI8qFTwO7+S0NVA0C90o=",
         "owner": "simple-nixos-mailserver",
         "repo": "nixos-mailserver",
-        "rev": "506c6151d6f1dc11c4de3876863b9793fe8f3c8f",
+        "rev": "53007af63fade28853408370c4c600a63dd97f41",
         "type": "gitlab"
       },
       "original": {
         "owner": "simple-nixos-mailserver",
+        "ref": "nixos-25.05",
         "repo": "nixos-mailserver",
         "type": "gitlab"
       }
diff --git a/flake.nix b/flake.nix
index d9b3d4c..49e4fea 100644
--- a/flake.nix
+++ b/flake.nix
@@ -26,7 +26,7 @@
     };
     nixos-hardware.url = "github:NixOS/nixos-hardware";
     nixos-mailserver = {
-      url = "gitlab:simple-nixos-mailserver/nixos-mailserver";
+      url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-25.05";
       inputs.nixpkgs.follows = "nixpkgs";
     };
     nixvim = {