diff --git a/flake.lock b/flake.lock
index 4b0e61c..1481241 100644
--- a/flake.lock
+++ b/flake.lock
@@ -186,6 +186,31 @@
         "type": "github"
       }
     },
+    "hyprland-protocols_2": {
+      "inputs": {
+        "nixpkgs": [
+          "xdg-desktop-portal-hyprland",
+          "nixpkgs"
+        ],
+        "systems": [
+          "xdg-desktop-portal-hyprland",
+          "systems"
+        ]
+      },
+      "locked": {
+        "lastModified": 1721326555,
+        "narHash": "sha256-zCu4R0CSHEactW9JqYki26gy8h9f6rHmSwj4XJmlHgg=",
+        "owner": "hyprwm",
+        "repo": "hyprland-protocols",
+        "rev": "5a11232266bf1a1f5952d5b179c3f4b2facaaa84",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hyprwm",
+        "repo": "hyprland-protocols",
+        "type": "github"
+      }
+    },
     "hyprlang": {
       "inputs": {
         "hyprutils": [
@@ -215,6 +240,29 @@
         "type": "github"
       }
     },
+    "hyprlang_2": {
+      "inputs": {
+        "hyprutils": "hyprutils_2",
+        "nixpkgs": [
+          "xdg-desktop-portal-hyprland",
+          "nixpkgs"
+        ],
+        "systems": "systems_3"
+      },
+      "locked": {
+        "lastModified": 1721324361,
+        "narHash": "sha256-BiJKO0IIdnSwHQBSrEJlKlFr753urkLE48wtt0UhNG4=",
+        "owner": "hyprwm",
+        "repo": "hyprlang",
+        "rev": "adbefbf49664a6c2c8bf36b6487fd31e3eb68086",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hyprwm",
+        "repo": "hyprlang",
+        "type": "github"
+      }
+    },
     "hyprutils": {
       "inputs": {
         "nixpkgs": [
@@ -240,6 +288,33 @@
         "type": "github"
       }
     },
+    "hyprutils_2": {
+      "inputs": {
+        "nixpkgs": [
+          "xdg-desktop-portal-hyprland",
+          "hyprlang",
+          "nixpkgs"
+        ],
+        "systems": [
+          "xdg-desktop-portal-hyprland",
+          "hyprlang",
+          "systems"
+        ]
+      },
+      "locked": {
+        "lastModified": 1721324102,
+        "narHash": "sha256-WAZ0X6yJW1hFG6otkHBfyJDKRpNP5stsRqdEuHrFRpk=",
+        "owner": "hyprwm",
+        "repo": "hyprutils",
+        "rev": "962582a090bc233c4de9d9897f46794280288989",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hyprwm",
+        "repo": "hyprutils",
+        "type": "github"
+      }
+    },
     "hyprwayland-scanner": {
       "inputs": {
         "nixpkgs": [
@@ -333,13 +408,30 @@
         "type": "github"
       }
     },
+    "nixpkgs_4": {
+      "locked": {
+        "lastModified": 1722062969,
+        "narHash": "sha256-QOS0ykELUmPbrrUGmegAUlpmUFznDQeR4q7rFhl8eQg=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "b73c2221a46c13557b1b3be9c2070cc42cf01eb3",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "root": {
       "inputs": {
         "home-manager": "home-manager",
         "hyprland": "hyprland",
         "nix-minecraft": "nix-minecraft",
         "nixpkgs": "nixpkgs_3",
-        "spicetify-nix": "spicetify-nix"
+        "spicetify-nix": "spicetify-nix",
+        "xdg-desktop-portal-hyprland": "xdg-desktop-portal-hyprland"
       }
     },
     "spicetify-nix": {
@@ -393,6 +485,57 @@
         "type": "github"
       }
     },
+    "systems_3": {
+      "locked": {
+        "lastModified": 1689347949,
+        "narHash": "sha256-12tWmuL2zgBgZkdoB6qXZsgJEH9LR3oUgpaQq2RbI80=",
+        "owner": "nix-systems",
+        "repo": "default-linux",
+        "rev": "31732fcf5e8fea42e59c2488ad31a0e651500f68",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default-linux",
+        "type": "github"
+      }
+    },
+    "systems_4": {
+      "locked": {
+        "lastModified": 1689347949,
+        "narHash": "sha256-12tWmuL2zgBgZkdoB6qXZsgJEH9LR3oUgpaQq2RbI80=",
+        "owner": "nix-systems",
+        "repo": "default-linux",
+        "rev": "31732fcf5e8fea42e59c2488ad31a0e651500f68",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default-linux",
+        "type": "github"
+      }
+    },
+    "xdg-desktop-portal-hyprland": {
+      "inputs": {
+        "hyprland-protocols": "hyprland-protocols_2",
+        "hyprlang": "hyprlang_2",
+        "nixpkgs": "nixpkgs_4",
+        "systems": "systems_4"
+      },
+      "locked": {
+        "lastModified": 1724073926,
+        "narHash": "sha256-nWlUL43jOFHf+KW6Hqrx+W/r1XdXuDyb0wC/SrHsOu4=",
+        "owner": "hyprwm",
+        "repo": "xdg-desktop-portal-hyprland",
+        "rev": "a08ecbbf33598924e93542f737fc6169a26b481e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hyprwm",
+        "repo": "xdg-desktop-portal-hyprland",
+        "type": "github"
+      }
+    },
     "xdph": {
       "inputs": {
         "hyprland-protocols": "hyprland-protocols",
diff --git a/home-manager.nix b/home-manager.nix
index 0baaafc..4627a18 100644
--- a/home-manager.nix
+++ b/home-manager.nix
@@ -127,15 +127,11 @@
     ## Desktop environment
     cliphist
     grim
-    libsForQt5.ark
     mako
+    polkit-kde-agent
     slurp
     swww
 
-    # Mail client
-    thunderbird
-    protonmail-bridge-gui
-
     ## Theming
     (nerdfonts.override {
       fonts = [
@@ -273,9 +269,7 @@
     };
   };
 
-  #
-  ## THEMING #
-  #
+  ## Theming
   home.pointerCursor = {
     package = pkgs.catppuccin-cursors.frappeLavender;
     name = "catppuccin-frappe-lavender-cursors";
diff --git a/nixos.nix b/nixos.nix
index e4c2b77..93c53c1 100644
--- a/nixos.nix
+++ b/nixos.nix
@@ -22,7 +22,6 @@ in
     ./hardware-configuration.nix
     # Include service configuration
     ./services/archi.nix
-    ./services/authentication.nix
     ./services/caddy.nix
     ./services/forgejo.nix
     ./services/jellyfin.nix
diff --git a/scripts/hyprland/start_services.sh b/scripts/hyprland/start_services.sh
index 024ecbc..78453a0 100755
--- a/scripts/hyprland/start_services.sh
+++ b/scripts/hyprland/start_services.sh
@@ -5,6 +5,11 @@
 #
 dbus-update-activation-environment --systemd WAYLAND_DISPLAY XDG_CURRENT_DESKTOP &
 
+#
+# Start authentication polkit.
+#
+/nix/store/$(ls -la /nix/store | rg '^d.*polkit-kde-agent.*\d$' | awk '{print $9}')/libexec/polkit-kde-authentication-agent-1 &
+
 #
 # Start waybar.
 #
@@ -60,8 +65,3 @@ fcitx5 &
 # Start the blueman applet for managing bluetooth devices
 #
 blueman-applet &
-
-#
-# Start the brige between Proton Mail and Thunderbird
-#
-protonmail-bridge-gui
diff --git a/services/authentication.nix b/services/authentication.nix
deleted file mode 100644
index 94797f5..0000000
--- a/services/authentication.nix
+++ /dev/null
@@ -1,12 +0,0 @@
-{ pkgs, ... }:
-
-{
-  # Enable polkit,
-  security.polkit.enable = true;
-
-  # Install an agent to interface with it.
-  environment.systemPackages = with pkgs; [ polkit_gnome ];
-
-  # And enable GNOME keyring for registering keys.
-  services.gnome.gnome-keyring.enable = true;
-}