diff --git a/src/AbstractBubble.vala b/src/AbstractBubble.vala
index 32d6b0e..711deb7 100644
--- a/src/AbstractBubble.vala
+++ b/src/AbstractBubble.vala
@@ -18,8 +18,18 @@
 *
 */
 
+public enum Notifications.CloseReason {
+    EXPIRED = 1,
+    DISMISSED = 2,
+    /**
+     * This value is unique for org.freedesktop.Notifications server interface and must not be used elsewhere.
+     */
+    CLOSE_NOTIFICATION_CALL = 3,
+    UNDEFINED = 4
+}
+
 public class Notifications.AbstractBubble : Gtk.Window {
-    public signal void closed (uint32 reason) {
+    public signal void closed (CloseReason reason) {
         close ();
     }
 
@@ -94,7 +104,7 @@ public class Notifications.AbstractBubble : Gtk.Window {
         set_titlebar (new Gtk.Grid ());
 
         carousel.page_changed.connect (on_page_changed);
-        close_button.clicked.connect (() => closed (Notifications.Server.CloseReason.DISMISSED));
+        close_button.clicked.connect (() => closed (CloseReason.DISMISSED));
 
         var motion_controller = new Gtk.EventControllerMotion ();
         motion_controller.enter.connect (pointer_enter);
@@ -127,7 +137,7 @@ public class Notifications.AbstractBubble : Gtk.Window {
 
     private void on_page_changed (Adw.Carousel carousel, uint index) {
         if (carousel.get_nth_page (index) != overlay) {
-            closed (Notifications.Server.CloseReason.DISMISSED);
+            closed (CloseReason.DISMISSED);
         }
     }
 
@@ -177,11 +187,10 @@ public class Notifications.AbstractBubble : Gtk.Window {
     }
 
     private bool timeout_expired () {
-        closed (Notifications.Server.CloseReason.EXPIRED);
+        closed (CloseReason.EXPIRED);
         return Source.REMOVE;
     }
 
-
     private void get_blur_margins (out int left, out int right) {
         var width = get_width ();
         var distance = (1 - current_swipe_progress) * width;
diff --git a/src/Bubble.vala b/src/Bubble.vala
index 4570f6b..88b068e 100644
--- a/src/Bubble.vala
+++ b/src/Bubble.vala
@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2023 elementary, Inc. (https://elementary.io)
+ * Copyright 2019-2025 elementary, Inc. (https://elementary.io)
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
@@ -56,7 +56,7 @@ public class Notifications.Bubble : AbstractBubble {
             notification.app_info.launch_uris_async.begin (null, null, null, (obj, res) => {
                 try {
                     ((AppInfo) obj).launch_uris_async.end (res);
-                    closed (Server.CloseReason.UNDEFINED);
+                    closed (CloseReason.UNDEFINED);
                 } catch (Error e) {
                     warning ("Unable to launch app: %s", e.message);
                 }
diff --git a/src/DBus.vala b/src/DBus.vala
index ce6434b..1ec31f4 100644
--- a/src/DBus.vala
+++ b/src/DBus.vala
@@ -1,17 +1,10 @@
 /*
- * Copyright 2019-2023 elementary, Inc. (https://elementary.io)
+ * Copyright 2019-2025 elementary, Inc. (https://elementary.io)
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
 [DBus (name = "org.freedesktop.Notifications")]
 public class Notifications.Server : Object {
-    public enum CloseReason {
-        EXPIRED = 1,
-        DISMISSED = 2,
-        CLOSE_NOTIFICATION_CALL = 3,
-        UNDEFINED = 4
-    }
-
     public signal void action_invoked (uint32 id, string action_key);
     public signal void notification_closed (uint32 id, uint32 reason);
 
diff --git a/src/FdoActionGroup.vala b/src/FdoActionGroup.vala
index 29af9ec..53d35c0 100644
--- a/src/FdoActionGroup.vala
+++ b/src/FdoActionGroup.vala
@@ -1,5 +1,5 @@
 /*
- * Copyright 2023 elementary, Inc. (https://elementary.io)
+ * Copyright 2023-2025 elementary, Inc. (https://elementary.io)
  * SPDX-License-Identifier: GPL-3.0-or-later
  *
  * Author: Gustavo Marques <pushstarttocontinue@outlook.com>
@@ -95,7 +95,7 @@ public sealed class Notifications.Fdo.ActionGroup : Object, GLib.ActionGroup {
             uint32 id;
 
             while (iter.next ("u", out id)) {
-                server.notification_closed (id, Server.CloseReason.DISMISSED);
+                server.notification_closed (id, CloseReason.DISMISSED);
             }
 
             return;
@@ -120,7 +120,7 @@ public sealed class Notifications.Fdo.ActionGroup : Object, GLib.ActionGroup {
     /* GLib says that we are only meant to override list_actions and query_actions,
     * however, the gio bindings only have query_action marked as virtual.
     *
-    * FIXME: remove everthing below when we have valac 0.58 as minimal version.
+    * FIXME: remove everything below when we have valac 0.58 as minimal version.
     */
     public bool has_action (string action_name) {
         return action_name in (Gee.Collection<string>) actions;