diff --git a/flake.lock b/flake.lock
index 45994b4..b72ec57 100644
--- a/flake.lock
+++ b/flake.lock
@@ -37,6 +37,22 @@
         "type": "gitlab"
       }
     },
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1668681692,
+        "narHash": "sha256-Ht91NGdewz8IQLtWZ9LCeNXMSXHUss+9COoqu6JLmXU=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "009399224d5e398d03b22badca40a37ac85412a1",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
     "flake-utils": {
       "locked": {
         "lastModified": 1638122382,
@@ -75,11 +91,26 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1686035213,
-        "narHash": "sha256-hRcXUoVWWuLqFzQ1QVQx4ewvbnst1NkCxoZhmpzrilA=",
+        "lastModified": 1686431482,
+        "narHash": "sha256-oPVQ/0YP7yC2ztNsxvWLrV+f0NQ2QAwxbrZ+bgGydEM=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "d83945caa7624015f11b152bf5c6c4363ffe9f7c",
+        "rev": "d3bb401dcfc5a46ce51cdfb5762e70cc75d082d2",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-23.05",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs-22_11": {
+      "locked": {
+        "lastModified": 1669558522,
+        "narHash": "sha256-yqxn+wOiPqe6cxzOo4leeJOp1bXE/fjPEi/3F/bBHv8=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "ce5fe99df1f15a09a91a86be9738d68fadfbad82",
         "type": "github"
       },
       "original": {
@@ -90,11 +121,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1686135559,
-        "narHash": "sha256-pY8waAV8K/sbHBdLn5diPFnQKpNg0YS9w03MrD2lUGE=",
+        "lastModified": 1686501370,
+        "narHash": "sha256-G0WuM9fqTPRc2URKP9Lgi5nhZMqsfHGrdEbrLvAPJcg=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "381e92a35e2d196fdd6077680dca0cd0197e75cb",
+        "rev": "75a5ebf473cd60148ba9aec0d219f72e5cf52519",
         "type": "github"
       },
       "original": {
@@ -116,25 +147,27 @@
     "simple-nixos-mailserver": {
       "inputs": {
         "blobs": "blobs",
+        "flake-compat": "flake-compat",
         "nixpkgs": [
           "nixpkgs-unstable"
         ],
-        "nixpkgs-22_11": [
+        "nixpkgs-22_11": "nixpkgs-22_11",
+        "nixpkgs-23_05": [
           "nixpkgs"
         ],
         "utils": "utils"
       },
       "locked": {
-        "lastModified": 1671659164,
-        "narHash": "sha256-DbpT+v1POwFOInbrDL+vMbYV3mVbTkMxmJ5j50QnOcA=",
+        "lastModified": 1686496219,
+        "narHash": "sha256-8zXZ/813yzaRA84js98G3XQ3GEEzFGnxhjvVyxkEey0=",
         "owner": "simple-nixos-mailserver",
         "repo": "nixos-mailserver",
-        "rev": "bc667fb6afc45f6cc2d118ab77658faf2227cffd",
+        "rev": "4966c0f63f04659015f064f2aa34b1893a16dfde",
         "type": "gitlab"
       },
       "original": {
         "owner": "simple-nixos-mailserver",
-        "ref": "nixos-22.11",
+        "ref": "nixos-23.05",
         "repo": "nixos-mailserver",
         "type": "gitlab"
       }