diff --git a/flake.lock b/flake.lock
index b861d93..8f0a176 100644
--- a/flake.lock
+++ b/flake.lock
@@ -94,16 +94,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1701540982,
-        "narHash": "sha256-5ajSy6ODgGmAbmymRdHnjfVnuVrACjI8wXoGVvrtvww=",
+        "lastModified": 1705641746,
+        "narHash": "sha256-D6c2aH8HQbWc7ZWSV0BUpFpd94ImFyCP8jFIsKQ4Slg=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "6386d8aafc28b3a7ed03880a57bdc6eb4465491d",
+        "rev": "d2003f2223cbb8cd95134e4a0541beea215c1073",
         "type": "github"
       },
       "original": {
         "id": "nixpkgs",
-        "ref": "nixos-23.05",
+        "ref": "nixos-23.11",
         "type": "indirect"
       }
     },
@@ -122,13 +122,28 @@
         "type": "indirect"
       }
     },
-    "nixpkgs-unstable": {
+    "nixpkgs-23_05": {
       "locked": {
-        "lastModified": 1701436327,
-        "narHash": "sha256-tRHbnoNI8SIM5O5xuxOmtSLnswEByzmnQcGGyNRjxsE=",
+        "lastModified": 1684782344,
+        "narHash": "sha256-SHN8hPYYSX0thDrMLMWPWYulK3YFgASOrCsIL3AJ78g=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "91050ea1e57e50388fa87a3302ba12d188ef723a",
+        "rev": "8966c43feba2c701ed624302b6a935f97bcbdf88",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-23.05",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs-unstable": {
+      "locked": {
+        "lastModified": 1705496572,
+        "narHash": "sha256-rPIe9G5EBLXdBdn9ilGc0nq082lzQd0xGGe092R/5QE=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "842d9d80cfd4560648c785f8a4e6f3b096790e19",
         "type": "github"
       },
       "original": {
@@ -155,22 +170,23 @@
           "nixpkgs-unstable"
         ],
         "nixpkgs-22_11": "nixpkgs-22_11",
-        "nixpkgs-23_05": [
+        "nixpkgs-23_05": "nixpkgs-23_05",
+        "nixpkgs-23_11": [
           "nixpkgs"
         ],
         "utils": "utils"
       },
       "locked": {
-        "lastModified": 1687462267,
-        "narHash": "sha256-rNSputjn/0HEHHnsKfQ8mQVEPVchcBw7DsbND7Wg8dk=",
+        "lastModified": 1703023684,
+        "narHash": "sha256-XQU4OaacV0F2tf9cNAvIMqlC0HBIrAtvb0MLjIHt+7M=",
         "owner": "simple-nixos-mailserver",
         "repo": "nixos-mailserver",
-        "rev": "24128c3052090311688b09a400aa408ba61c6ee5",
+        "rev": "4bfb8eb058f098302c97b909df2d019926e11220",
         "type": "gitlab"
       },
       "original": {
         "owner": "simple-nixos-mailserver",
-        "ref": "nixos-23.05",
+        "ref": "nixos-23.11",
         "repo": "nixos-mailserver",
         "type": "gitlab"
       }