diff --git a/flake.lock b/flake.lock
index 966a1397..52479742 100644
--- a/flake.lock
+++ b/flake.lock
@@ -268,16 +268,17 @@
         "nixpkgs": [
           "nixpkgs"
         ],
+        "nixpkgs-22_05": "nixpkgs-22_05",
         "utils": [
           "flake-utils"
         ]
       },
       "locked": {
-        "lastModified": 1653423337,
-        "narHash": "sha256-TLNyDhwhQWimt5QWzFf/3B7lKk5isdICNRTwiCAhiB0=",
+        "lastModified": 1655930346,
+        "narHash": "sha256-ht56HHOzEhjeIgAv5ZNFjSVX/in1YlUs0HG9c1EUXTM=",
         "owner": "simple-nixos-mailserver",
         "repo": "nixos-mailserver",
-        "rev": "15cf252a0dfffb2420a60fbd6be3467c11026142",
+        "rev": "f535d8123c4761b2ed8138f3d202ea710a334a1d",
         "type": "gitlab"
       },
       "original": {
@@ -302,6 +303,21 @@
         "type": "github"
       }
     },
+    "nixpkgs-22_05": {
+      "locked": {
+        "lastModified": 1654936503,
+        "narHash": "sha256-soKzdhI4jTHv/rSbh89RdlcJmrPgH8oMb/PLqiqIYVQ=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "dab6df51387c3878cdea09f43589a15729cae9f4",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-22.05",
+        "type": "indirect"
+      }
+    },
     "nmd": {
       "flake": false,
       "locked": {