diff --git a/services/mail-server.nix b/services/mail-server.nix
index 13fca17..2c707b7 100644
--- a/services/mail-server.nix
+++ b/services/mail-server.nix
@@ -17,8 +17,8 @@ in
 
   imports = [
     (builtins.fetchTarball {
-      url = "https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/archive/v2.2.0/nixos-mailserver-v2.2.0.tar.gz";
-      sha256 = "0gqzgy50hgb5zmdjiffaqp277a68564vflfpjvk1gv6079zahksc";
+      url = "https://gitlab.com/simple-nixos-mailserver/nixos-mailserver/-/archive/817d84d36d34616ecf1a6ed6cba4fb1327b3a74f/nixos-mailserver-817d84d36d34616ecf1a6ed6cba4fb1327b3a74f.tar.gz";
+      sha256 = "0f7j61nlh4f3nqq3hbw0k4aq4mnmlp12cmkvyfwzrai92lpza4f9";
     })
   ];
 
@@ -42,6 +42,9 @@ in
       certificateFile = "/var/lib/acme/${cfg.domaine}/fullchain.pem";
       keyFile = "/var/lib/acme/${cfg.domaine}/key.pem";
 
+      # Length of the Diffie Hillman prime used
+      dhParamBitLength = 4096;
+
       # Enable IMAP and POP3
       enableImap = true;
       enablePop3 = true;
diff --git a/services/pr-autobot.py b/services/pr-autobot.py
index a1ad4b1..0d41877 100755
--- a/services/pr-autobot.py
+++ b/services/pr-autobot.py
@@ -13,7 +13,7 @@ parser.add_argument('--repo')
 parser.add_argument('--cache-dir')
 args = vars(parser.parse_args())
 
-channel_req = urllib.request.Request(url='https://nixos.org/channels/nixos-18.09/git-revision')
+channel_req = urllib.request.Request(url='https://nixos.org/channels/nixos-18.09-small/git-revision')
 latest_commit = urllib.request.urlopen(channel_req).read().decode('utf-8')
 try:
     previous_commit = open(args['cache_dir'] + '/git-revision', 'r').read()
diff --git a/services/sdtdserver.nix b/services/sdtdserver.nix
deleted file mode 100644
index 2e75443..0000000
--- a/services/sdtdserver.nix
+++ /dev/null
@@ -1,113 +0,0 @@
-{lib, config, pkgs, ... }:
-
-with lib;
-
-let
-  cfg = config.services.sdtdserver;
-  gamePath = "/var/lib/sdtdserver";
-  gameOptions = {
-    ServerPort="26900";
-    ServerIsPublic="true";
-    ServerName="Serveur des loutres";
-    ServerPassword="";
-    ServerMaxPlayerCount="16";
-    ServerReservedSlots="0";
-    ServerReservedSlotsPermission="100";
-    ServerAdminSlots="0";
-    ServerAdminSlotsPermission="0";
-    ServerDescription="Un serveur idiot anti gilets jaunes";
-    ServerWebsiteURL="";
-    ServerDisabledNetworkProtocols="UNET";
-    GameWorld="Random Gen";
-    GameName="Loutre Game";
-    GameDifficulty="2";
-    GameMode="GameModeSurvivalMP";
-    ZombiesRun="0";
-    BuildCreate="false";
-    DayNightLength="60";
-    DayLightLength="18";
-    PlayerKillingMode="3";
-    PersistentPlayerProfiles="false";
-    PlayerSafeZoneLevel="5";
-    PlayerSafeZoneHours="5";
-    ControlPanelEnabled="false";
-    ControlPanelPort="8080";
-    ControlPanelPassword="CHANGEME";
-    TelnetEnabled="false";
-    TelnetPort="8081";
-    TelnetPassword="";
-    AdminFileName="serveradmin.xml";
-    DropOnDeath="0";
-    DropOnQuit="0";
-    BloodMoonEnemyCount="8";
-    EnemySpawnMode="true";
-    EnemyDifficulty="0";
-    BlockDurabilityModifier="100";
-    LootAbundance="100";
-    LootRespawnDays="30";
-    LandClaimSize="41";
-    LandClaimDeadZone="30";
-    LandClaimExpiryTime="3";
-    LandClaimDecayMode="0";
-    LandClaimOnlineDurabilityModifier="4";
-    LandClaimOfflineDurabilityModifier="4";
-    AirDropFrequency="72";
-    AirDropMarker="false";
-    MaxSpawnedZombies="60";
-    MaxSpawnedAnimals="50";
-    EACEnabled="true";
-    HideCommandExecutionLog="0";
-    MaxUncoveredMapChunksPerPlayer="131072";
-    BedrollDeadZoneSize="15";
-  };
-  gameConfig = builtins.toFile "serverconfig.xml" ''
-    <?xml version="1.0"?>
-    <ServerSettings>
-    ${concatStrings (
-      mapAttrsToList (name: value:
-       "  <property name=\"${name}\"	value=\"${value}\"/>\n"
-    ) gameOptions)}
-    </ServerSettings>
-  '';
-in
-{
-  options.services.sdtdserver = {
-    enable = mkEnableOption "Activation du serveur dédié 7 Days to Die";
-  };
-
-  config = mkIf cfg.enable {
-
-    systemd.services.sdtdserver = {
-      description = "Serveur dédié 7 Days to Die";
-      requires = ["network-online.target"];
-      wantedBy = ["multi-user.target"];
-      environment = { HOME = gamePath; };
-      serviceConfig = {
-        DynamicUser = true;
-        StateDirectory = "sdtdserver";
-      };
-      preStart = let
-        libPath = with pkgs; lib.makeLibraryPath [
-          stdenv.cc.cc.lib
-        ];
-      in ''
-        ${pkgs.steamcmd}/bin/steamcmd +login anonymous +force_install_dir ${gamePath} +app_update 294420 validate +quit
-        ${pkgs.patchelf}/bin/patchelf \
-          --set-interpreter "$(cat ${pkgs.gcc}/nix-support/dynamic-linker)" \
-          --set-rpath "${libPath}" \
-          ${gamePath}/7DaysToDieServer.x86_64
-        install -m666 ${gameConfig} ${gamePath}/serverconfig.xml
-      '';
-      script = ''
-        ${gamePath}/7DaysToDieServer.x86_64 -quit -batchmode -nographics -dedicated -configfile=serverconfig.xml
-      '';
-    };
-
-    networking.firewall = {
-      allowedTCPPorts = [ 26900 ];
-      allowedUDPPorts = [ 26900 26901 26902 ];
-    };
-
-  };
-
-}
diff --git a/systems/LoutreOS/configuration.nix b/systems/LoutreOS/configuration.nix
index 16c4014..abd18ba 100644
--- a/systems/LoutreOS/configuration.nix
+++ b/systems/LoutreOS/configuration.nix
@@ -5,7 +5,7 @@
 { config, pkgs, ... }:
 
 let
-  gitRev = "17d85e2162f7a65d8515626692d2ae55226d4680";
+  gitRev = "b9c2a5800f8d42cedf0545663187597f73ca2b51";
   nixpkgs = fetchTarball "https://github.com/nyanloutre/nixpkgs/archive/${gitRev}.tar.gz";
 in
 {
@@ -53,8 +53,8 @@ in
   };
 
   networking.firewall = {
-    allowedTCPPorts = [ ];
-    allowedUDPPorts = [ ];
+    allowedTCPPorts = [  ];
+    allowedUDPPorts = [  ];
     enable = true;
   };
 
diff --git a/systems/LoutreOS/services.nix b/systems/LoutreOS/services.nix
index f246a1e..3a26b77 100644
--- a/systems/LoutreOS/services.nix
+++ b/systems/LoutreOS/services.nix
@@ -19,7 +19,6 @@ in
     ../../services/site-max.nix
     ../../services/auto-pr.nix
     ../../services/python-ci.nix
-    ../../services/sdtdserver.nix
     ../../containers/vsftpd.nix
   ];
 
@@ -361,8 +360,6 @@ in
     auto-pr.enable = true;
 
     python-ci.enable = true;
-
-    sdtdserver.enable = true;
   };
 
   /*