diff --git a/configuration.nix b/configuration.nix
index a9a8e7a..463994a 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -27,15 +27,12 @@ in
     # ./resources/limits.nix
   ];
 
-  # We have to use this version to be able to migrate from Gitea.
-  nixpkgs.config.permittedInsecurePackages = [
-    "forgejo-1.20.6-1-unstable-2024-04-18"
-  ];
-
   fileSystems."/".options = [ "noatime" ];
 
   services.selfprivacy-api.enable = true;
 
+  services.redis.package = pkgs.valkey;
+
   services.redis.servers.${redis-sp-api-srv-name} = {
     enable = true;
     save = [
diff --git a/flake.lock b/flake.lock
index 1cb4715..f9b7c36 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1720535198,
-        "narHash": "sha256-zwVvxrdIzralnSbcpghA92tWu2DV2lwv89xZc8MTrbg=",
+        "lastModified": 1722221733,
+        "narHash": "sha256-sga9SrrPb+pQJxG1ttJfMPheZvDOxApFfwXCFO0H9xw=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "205fd4226592cc83fd4c0885a3e4c9c400efabb5",
+        "rev": "12bf09802d77264e441f48e25459c10c93eada2e",
         "type": "github"
       },
       "original": {
@@ -28,11 +28,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1719847554,
-        "narHash": "sha256-DSPpfFVG7NOxJXhIe0FWOzII9nPG4WSwP4RD8sYRZFo=",
+        "lastModified": 1722347757,
+        "narHash": "sha256-zXnhxAnNV3KyLa3BKc1ZMakQdZBj6M3UZ4TIr1cbUSQ=",
         "ref": "master",
-        "rev": "4066be38ec11aabf47b03afd35778a53c6d28942",
-        "revCount": 1309,
+        "rev": "4cd90d0c93d758fcd931092edd3b68585e24ecb9",
+        "revCount": 1401,
         "type": "git",
         "url": "https://git.selfprivacy.org/SelfPrivacy/selfprivacy-rest-api.git"
       },
diff --git a/sp-modules/bitwarden/module.nix b/sp-modules/bitwarden/module.nix
index 5f4b799..ad4ab09 100644
--- a/sp-modules/bitwarden/module.nix
+++ b/sp-modules/bitwarden/module.nix
@@ -59,6 +59,9 @@ in
         ];
       };
     };
+    systemd.tmpfiles.rules = lib.mkIf sp.useBinds [
+      "d /volumes/${cfg.location}/bitwarden/backup 0700 vaultwarden vaultwarden -"
+    ];
     services.vaultwarden = {
       enable = true;
       dbBackend = "sqlite";
@@ -72,28 +75,36 @@ in
         EMERGENCY_ACCESS_ALLOWED = cfg.emergencyAccessAllowed;
       };
     };
-    systemd.services.bitwarden-secrets = {
-      before = [ "vaultwarden.service" ];
-      requiredBy = [ "vaultwarden.service" ];
-      serviceConfig.Type = "oneshot";
-      path = with pkgs; [ coreutils jq ];
-      script = ''
-        set -o nounset
+    systemd = {
+      services = {
+        vaultwarden.serviceConfig.Slice = "bitwarden.slice";
+        bitwarden-secrets = {
+          before = [ "vaultwarden.service" ];
+          requiredBy = [ "vaultwarden.service" ];
+          serviceConfig.Type = "oneshot";
+          path = with pkgs; [ coreutils jq ];
+          script = ''
+            set -o nounset
 
-        token="$(jq -r '.bitwarden.adminToken' ${secrets-filepath})"
-        if [ "$token" == "null" ]; then
-            # If it's null, empty the contents of the file
-            bitwarden_env=""
-        else
-            bitwarden_env="ADMIN_TOKEN=$token"
-        fi
+            token="$(jq -r '.bitwarden.adminToken' ${secrets-filepath})"
+            if [ "$token" == "null" ]; then
+                # If it's null, empty the contents of the file
+                bitwarden_env=""
+            else
+                bitwarden_env="ADMIN_TOKEN=$token"
+            fi
 
-        install -C -m 0700 -o vaultwarden -g vaultwarden \
-        -d /var/lib/bitwarden
+            install -C -m 0700 -o vaultwarden -g vaultwarden \
+            -d /var/lib/bitwarden
 
-        install -C -m 0600 -o vaultwarden -g vaultwarden -DT \
-        <(printf "%s" "$bitwarden_env") ${bitwarden-env}
-      '';
+            install -C -m 0600 -o vaultwarden -g vaultwarden -DT \
+            <(printf "%s" "$bitwarden_env") ${bitwarden-env}
+          '';
+        };
+      };
+      slices.bitwarden = {
+        description = "Bitwarden service slice";
+      };
     };
     services.nginx.virtualHosts."${cfg.subdomain}.${sp.domain}" = {
       useACMEHost = sp.domain;
diff --git a/sp-modules/gitea/module.nix b/sp-modules/gitea/module.nix
index ca7d012..d854127 100644
--- a/sp-modules/gitea/module.nix
+++ b/sp-modules/gitea/module.nix
@@ -146,7 +146,17 @@ in
         };
       };
     };
-    systemd.services.forgejo.unitConfig.RequiresMountsFor =
-      lib.mkIf sp.useBinds "/volumes/${cfg.location}/gitea";
+    systemd = {
+      services.forgejo = {
+        unitConfig.RequiresMountsFor = lib.mkIf sp.useBinds "/volumes/${cfg.location}/gitea";
+        serviceConfig = {
+          Slice = "gitea.slice";
+        };
+      };
+      slices.gitea = {
+        description = "Forgejo service slice";
+      };
+    };
+
   };
 }
diff --git a/sp-modules/jitsi-meet/module.nix b/sp-modules/jitsi-meet/module.nix
index 3dae656..09c6699 100644
--- a/sp-modules/jitsi-meet/module.nix
+++ b/sp-modules/jitsi-meet/module.nix
@@ -40,5 +40,15 @@ in
       useACMEHost = domain;
       enableACME = false;
     };
+    systemd = {
+      services = {
+        jicofo.serviceConfig.Slice = "jitsi_meet.slice";
+        jitsi-videobridge2.serviceConfig.Slice = "jitsi_meet.slice";
+        prosody.serviceConfig.Slice = "jitsi_meet.slice";
+      };
+      slices.jitsi_meet = {
+        description = "Jitsi Meet service slice";
+      };
+    };
   };
 }
diff --git a/sp-modules/monitoring/module.nix b/sp-modules/monitoring/module.nix
index 7ad8f83..5981af7 100644
--- a/sp-modules/monitoring/module.nix
+++ b/sp-modules/monitoring/module.nix
@@ -1,6 +1,8 @@
-{config, lib, ...}: let
+{ config, lib, ... }:
+let
   cfg = config.selfprivacy.modules.monitoring;
-in {
+in
+{
   options.selfprivacy.modules.monitoring = {
     enable = lib.mkOption {
       default = false;
@@ -21,6 +23,12 @@ in {
         ];
       };
     };
+    services.cadvisor = {
+      enable = true;
+      port = 9003;
+      listenAddress = "127.0.0.1";
+      extraOptions = [ "--enable_metrics=cpu,memory,diskIO" ];
+    };
     services.prometheus = {
       enable = true;
       port = 9001;
@@ -40,7 +48,23 @@ in {
             targets = [ "127.0.0.1:9002" ];
           }];
         }
+        {
+          job_name = "cadvisor";
+          static_configs = [{
+            targets = [ "127.0.0.1:9003" ];
+          }];
+        }
       ];
     };
+    systemd = {
+      services = {
+        prometheus.serviceConfig.Slice = "monitoring.slice";
+        prometheus-node-exporter.serviceConfig.Slice = "monitoring.slice";
+        cadvisor.serviceConfig.Slice = "monitoring.slice";
+      };
+      slices.monitoring = {
+        description = "Monitoring service slice";
+      };
+    };
   };
 }
diff --git a/sp-modules/nextcloud/module.nix b/sp-modules/nextcloud/module.nix
index 95286c7..b713f0d 100644
--- a/sp-modules/nextcloud/module.nix
+++ b/sp-modules/nextcloud/module.nix
@@ -34,27 +34,39 @@
           ];
         };
       };
-      systemd.services.nextcloud-secrets = {
-        before = [ "nextcloud-setup.service" ];
-        requiredBy = [ "nextcloud-setup.service" ];
-        serviceConfig.Type = "oneshot";
-        path = with pkgs; [ coreutils jq ];
-        script = ''
-          databasePassword=$(jq -re '.modules.nextcloud.databasePassword' ${secrets-filepath})
-          adminPassword=$(jq -re '.modules.nextcloud.adminPassword' ${secrets-filepath})
+      systemd = {
+        services = {
+          phpfpm-nextcloud.serviceConfig.Slice = lib.mkForce "nextcloud.slice";
+          nextcloud-setup.serviceConfig.Slice = "nextcloud.slice";
+          nextcloud-cron.serviceConfig.Slice = "nextcloud.slice";
+          nextcloud-update-db.serviceConfig.Slice = "nextcloud.slice";
+          nextcloud-update-plugins.serviceConfig.Slice = "nextcloud.slice";
+          nextcloud-secrets = {
+            before = [ "nextcloud-setup.service" ];
+            requiredBy = [ "nextcloud-setup.service" ];
+            serviceConfig.Type = "oneshot";
+            path = with pkgs; [ coreutils jq ];
+            script = ''
+              databasePassword=$(jq -re '.modules.nextcloud.databasePassword' ${secrets-filepath})
+              adminPassword=$(jq -re '.modules.nextcloud.adminPassword' ${secrets-filepath})
 
-          install -C -m 0440 -o nextcloud -g nextcloud -DT \
-          <(printf "%s\n" "$databasePassword") \
-          ${db-pass-filepath}
+              install -C -m 0440 -o nextcloud -g nextcloud -DT \
+              <(printf "%s\n" "$databasePassword") \
+              ${db-pass-filepath}
 
-          install -C -m 0440 -o nextcloud -g nextcloud -DT \
-          <(printf "%s\n" "$adminPassword") \
-          ${admin-pass-filepath}
-        '';
+              install -C -m 0440 -o nextcloud -g nextcloud -DT \
+              <(printf "%s\n" "$adminPassword") \
+              ${admin-pass-filepath}
+            '';
+          };
+        };
+        slices.nextcloud = {
+          description = "Nextcloud service slice";
+        };
       };
       services.nextcloud = {
         enable = true;
-        package = pkgs.nextcloud27;
+        package = pkgs.nextcloud28;
         inherit hostName;
 
         # Use HTTPS for links
@@ -65,10 +77,12 @@
         # set what time makes sense for you
         autoUpdateApps.startAt = "05:00:00";
 
-        config = {
+        settings = {
           # further forces Nextcloud to use HTTPS
-          overwriteProtocol = "https";
+          overwriteprotocol = "https";
+        };
 
+        config = {
           dbtype = "sqlite";
           dbuser = "nextcloud";
           dbname = "nextcloud";
diff --git a/sp-modules/ocserv/module.nix b/sp-modules/ocserv/module.nix
index b7ebd6b..f4d2dc0 100644
--- a/sp-modules/ocserv/module.nix
+++ b/sp-modules/ocserv/module.nix
@@ -75,6 +75,16 @@ in
         proxy_cookie_path / "/; secure; HttpOnly; SameSite=strict";
       '';
     };
-    systemd.services.ocserv.unitConfig.ConditionPathExists = [ cert key ];
+    systemd = {
+      services = {
+        ocserv = {
+          unitConfig.ConditionPathExists = [ cert key ];
+          serviceConfig.Slice = "ocserv.slice";
+        };
+      };
+      slices.ocserv = {
+        description = "ocserv service slice";
+      };
+    };
   };
 }
diff --git a/sp-modules/pleroma/module.nix b/sp-modules/pleroma/module.nix
index 97cda59..f345e5d 100644
--- a/sp-modules/pleroma/module.nix
+++ b/sp-modules/pleroma/module.nix
@@ -68,28 +68,7 @@ in
         ];
       };
     };
-    systemd.services.pleroma-secrets = {
-      before = [ "pleroma.service" ];
-      requiredBy = [ "pleroma.service" ];
-      serviceConfig.Type = "oneshot";
-      path = with pkgs; [ coreutils jq ];
-      script = ''
-        set -o nounset
 
-        password="$(jq -re '.databasePassword' ${secrets-filepath})"
-        filecontents=$(cat <<- EOF
-        import Config
-        config :pleroma, Pleroma.Repo,
-          password: "$password"
-        EOF
-        )
-
-        install -C -m 0700 -o pleroma -g pleroma -d /var/lib/pleroma
-
-        install -C -m 0600 -o pleroma -g pleroma -DT \
-        <(printf "%s" "$filecontents") ${secrets-exs}
-      '';
-    };
     environment.etc."setup.psql".text = ''
       CREATE USER pleroma;
       CREATE DATABASE pleroma OWNER pleroma;
@@ -105,8 +84,40 @@ in
       isSystemUser = true;
       group = "pleroma";
     };
-    # seems to be an upstream nixpkgs/nixos bug (missing hexdump)
-    systemd.services.pleroma.path = [ pkgs.util-linux ];
+    systemd = {
+      services = {
+        pleroma-secrets = {
+          before = [ "pleroma.service" ];
+          requiredBy = [ "pleroma.service" ];
+          serviceConfig.Type = "oneshot";
+          path = with pkgs; [ coreutils jq ];
+          script = ''
+            set -o nounset
+
+            password="$(jq -re '.databasePassword' ${secrets-filepath})"
+            filecontents=$(cat <<- EOF
+            import Config
+            config :pleroma, Pleroma.Repo,
+              password: "$password"
+            EOF
+            )
+
+            install -C -m 0700 -o pleroma -g pleroma -d /var/lib/pleroma
+
+            install -C -m 0600 -o pleroma -g pleroma -DT \
+            <(printf "%s" "$filecontents") ${secrets-exs}
+          '';
+        };
+        pleroma = {
+          # seems to be an upstream nixpkgs/nixos bug (missing hexdump)
+          path = [ pkgs.util-linux ];
+          serviceConfig.Slice = "pleroma.slice";
+        };
+      };
+      slices.pleroma = {
+        description = "Pleroma service slice";
+      };
+    };
     services.nginx.virtualHosts."${cfg.subdomain}.${sp.domain}" = {
       useACMEHost = sp.domain;
       root = "/var/www/${cfg.subdomain}.${sp.domain}";
diff --git a/sp-modules/roundcube/module.nix b/sp-modules/roundcube/module.nix
index 01b6566..a279ff1 100644
--- a/sp-modules/roundcube/module.nix
+++ b/sp-modules/roundcube/module.nix
@@ -35,5 +35,13 @@ in
       useACMEHost = domain;
       enableACME = false;
     };
+    systemd = {
+      services = {
+        phpfpm-roundcube.serviceConfig.Slice = lib.mkForce "roundcube.slice";
+      };
+      slices.roundcube = {
+        description = "Roundcube service slice";
+      };
+    };
   };
 }
diff --git a/sp-modules/simple-nixos-mailserver/config.nix b/sp-modules/simple-nixos-mailserver/config.nix
index 81d847f..a969f36 100644
--- a/sp-modules/simple-nixos-mailserver/config.nix
+++ b/sp-modules/simple-nixos-mailserver/config.nix
@@ -89,4 +89,18 @@ lib.mkIf sp.modules.simple-nixos-mailserver.enable
 
     virusScanning = false;
   };
+
+  systemd = {
+    services = {
+      dovecot2.serviceConfig.Slice = "simple_nixos_mailserver.slice";
+      postfix.serviceConfig.Slice = "simple_nixos_mailserver.slice";
+      rspamd.serviceConfig.Slice = "simple_nixos_mailserver.slice";
+      redis-rspamd.serviceConfig.Slice = "simple_nixos_mailserver.slice";
+      opendkim.serviceConfig.Slice = "simple_nixos_mailserver.slice";
+    };
+    slices."simple_nixos_mailserver" = {
+      name = "simple_nixos_mailserver.slice";
+      description = "Simple NixOS Mailserver service slice";
+    };
+  };
 }
diff --git a/sp-modules/simple-nixos-mailserver/flake.lock b/sp-modules/simple-nixos-mailserver/flake.lock
index bd18746..7f92ada 100644
--- a/sp-modules/simple-nixos-mailserver/flake.lock
+++ b/sp-modules/simple-nixos-mailserver/flake.lock
@@ -37,16 +37,15 @@
         "blobs": "blobs",
         "flake-compat": "flake-compat",
         "nixpkgs": "nixpkgs",
-        "nixpkgs-22_11": "nixpkgs-22_11",
-        "nixpkgs-23_05": "nixpkgs-23_05",
+        "nixpkgs-24_05": "nixpkgs-24_05",
         "utils": "utils"
       },
       "locked": {
-        "lastModified": 1700085753,
-        "narHash": "sha256-qtib7f3eRwfaUF+VziJXiBcZFqpHCAXS4HlrFsnzzl4=",
+        "lastModified": 1718084203,
+        "narHash": "sha256-Cx1xoVfSMv1XDLgKg08CUd1EoTYWB45VmB9XIQzhmzI=",
         "owner": "simple-nixos-mailserver",
         "repo": "nixos-mailserver",
-        "rev": "008d78cc21959e33d0d31f375b88353a7d7121ae",
+        "rev": "29916981e7b3b5782dc5085ad18490113f8ff63b",
         "type": "gitlab"
       },
       "original": {
@@ -70,33 +69,18 @@
         "type": "indirect"
       }
     },
-    "nixpkgs-22_11": {
+    "nixpkgs-24_05": {
       "locked": {
-        "lastModified": 1669558522,
-        "narHash": "sha256-yqxn+wOiPqe6cxzOo4leeJOp1bXE/fjPEi/3F/bBHv8=",
+        "lastModified": 1721949857,
+        "narHash": "sha256-DID446r8KsmJhbCzx4el8d9SnPiE8qa6+eEQOJ40vR0=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "ce5fe99df1f15a09a91a86be9738d68fadfbad82",
+        "rev": "a1cc729dcbc31d9b0d11d86dc7436163548a9665",
         "type": "github"
       },
       "original": {
         "id": "nixpkgs",
-        "ref": "nixos-22.11",
-        "type": "indirect"
-      }
-    },
-    "nixpkgs-23_05": {
-      "locked": {
-        "lastModified": 1684782344,
-        "narHash": "sha256-SHN8hPYYSX0thDrMLMWPWYulK3YFgASOrCsIL3AJ78g=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "8966c43feba2c701ed624302b6a935f97bcbdf88",
-        "type": "github"
-      },
-      "original": {
-        "id": "nixpkgs",
-        "ref": "nixos-23.05",
+        "ref": "nixos-24.05",
         "type": "indirect"
       }
     },