diff --git a/flake.lock b/flake.lock
index d8c6092..f312499 100644
--- a/flake.lock
+++ b/flake.lock
@@ -40,11 +40,11 @@
     "flake-compat": {
       "flake": false,
       "locked": {
-        "lastModified": 1696426674,
-        "narHash": "sha256-kvjfFW7WAETZlt09AgDn1MrtKzP7t90Vf7vypd3OL1U=",
+        "lastModified": 1668681692,
+        "narHash": "sha256-Ht91NGdewz8IQLtWZ9LCeNXMSXHUss+9COoqu6JLmXU=",
         "owner": "edolstra",
         "repo": "flake-compat",
-        "rev": "0f9255e01c2351cc7d116c072cb317785dd33b33",
+        "rev": "009399224d5e398d03b22badca40a37ac85412a1",
         "type": "github"
       },
       "original": {
@@ -76,26 +76,41 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1717696253,
-        "narHash": "sha256-1+ua0ggXlYYPLTmMl3YeYYsBXDSCqT+Gw3u6l4gvMhA=",
+        "lastModified": 1716633019,
+        "narHash": "sha256-xim1b5/HZYbWaZKyI7cn9TJCM6ewNVZnesRr00mXeS4=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "9b5328b7f761a7bbdc0e332ac4cf076a3eedb89b",
+        "rev": "9d29cd266cebf80234c98dd0b87256b6be0af44e",
         "type": "github"
       },
       "original": {
         "id": "nixpkgs",
-        "ref": "nixos-24.05",
+        "ref": "nixos-23.11",
+        "type": "indirect"
+      }
+    },
+    "nixpkgs-23_05": {
+      "locked": {
+        "lastModified": 1704290814,
+        "narHash": "sha256-LWvKHp7kGxk/GEtlrGYV68qIvPHkU9iToomNFGagixU=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "70bdadeb94ffc8806c0570eb5c2695ad29f0e421",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-23.05",
         "type": "indirect"
       }
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1717602782,
-        "narHash": "sha256-pL9jeus5QpX5R+9rsp3hhZ+uplVHscNJh8n8VpqscM0=",
+        "lastModified": 1716509168,
+        "narHash": "sha256-4zSIhSRRIoEBwjbPm3YiGtbd8HDWzFxJjw5DYSDy1n8=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "e8057b67ebf307f01bdcc8fba94d94f75039d1f6",
+        "rev": "bfb7a882678e518398ce9a31a881538679f6f092",
         "type": "github"
       },
       "original": {
@@ -120,51 +135,34 @@
         "nixpkgs": [
           "nixpkgs-unstable"
         ],
-        "nixpkgs-24_05": [
+        "nixpkgs-23_05": "nixpkgs-23_05",
+        "nixpkgs-23_11": [
           "nixpkgs"
         ],
         "utils": "utils"
       },
       "locked": {
-        "lastModified": 1717834029,
-        "narHash": "sha256-woG0M/WIrYDQeYd+aXRvGGMyojLmXND04Pi9XqE7ZxU=",
+        "lastModified": 1706219574,
+        "narHash": "sha256-qO+8UErk+bXCq2ybHU4GzXG4Ejk4Tk0rnnTPNyypW4g=",
         "owner": "simple-nixos-mailserver",
         "repo": "nixos-mailserver",
-        "rev": "62afb98ef6385bcb745d7b189ef4efdce2044030",
+        "rev": "e47f3719f1db3e0961a4358d4cb234a0acaa7baf",
         "type": "gitlab"
       },
       "original": {
         "owner": "simple-nixos-mailserver",
-        "ref": "nixos-24.05",
+        "ref": "nixos-23.11",
         "repo": "nixos-mailserver",
         "type": "gitlab"
       }
     },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
-    },
     "utils": {
-      "inputs": {
-        "systems": "systems"
-      },
       "locked": {
-        "lastModified": 1709126324,
-        "narHash": "sha256-q6EQdSeUZOG26WelxqkmR7kArjgWCdw5sfJVHPH/7j8=",
+        "lastModified": 1605370193,
+        "narHash": "sha256-YyMTf3URDL/otKdKgtoMChu4vfVL3vCMkRqpGifhUn0=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "d465f4819400de7c8d874d50b982301f28a84605",
+        "rev": "5021eac20303a61fafe17224c087f5519baed54d",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 32d3b48..18f2591 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,12 +1,12 @@
 {
   inputs = {
-    nixpkgs.url = "flake:nixpkgs/nixos-24.05";
+    nixpkgs.url = "flake:nixpkgs/nixos-23.11";
     nixpkgs-unstable.url = "flake:nixpkgs/nixos-unstable";
     simple-nixos-mailserver = {
-      url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-24.05";
+      url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-23.11";
       inputs = {
         nixpkgs.follows = "nixpkgs-unstable";
-        nixpkgs-24_05.follows = "nixpkgs";
+        nixpkgs-23_11.follows = "nixpkgs";
       };
     };
     dogetipbot-telegram = {
diff --git a/systems/LoutreOS/configuration.nix b/systems/LoutreOS/configuration.nix
index 1db9963..a6e4dca 100644
--- a/systems/LoutreOS/configuration.nix
+++ b/systems/LoutreOS/configuration.nix
@@ -37,7 +37,7 @@
     };
   };
 
-  hardware.usb-modeswitch.enable = true;
+  hardware.usbWwan.enable = true;
 
   # eno1 -> VLAN100 -> Internet
   # eno2 -> LAN
diff --git a/systems/LoutreOS/web.nix b/systems/LoutreOS/web.nix
index 036a528..9fda161 100644
--- a/systems/LoutreOS/web.nix
+++ b/systems/LoutreOS/web.nix
@@ -429,7 +429,7 @@ in
   };
 
   systemd.services.site-musique = let
-    djangoEnv =(pkgs.python3.withPackages (ps: with ps; [ gunicorn django_4 pillow setuptools ]));
+    djangoEnv =(pkgs.python3.withPackages (ps: with ps; [ gunicorn django_3 pillow setuptools ]));
   in {
     description = "Site Django de la musique de Meyenheim";
     after = [ "network.target" ];