diff --git a/Mastodon/Coordinator/SceneCoordinator.swift b/Mastodon/Coordinator/SceneCoordinator.swift
index e336e9a556..490503a18f 100644
--- a/Mastodon/Coordinator/SceneCoordinator.swift
+++ b/Mastodon/Coordinator/SceneCoordinator.swift
@@ -90,7 +90,7 @@ final public class SceneCoordinator {
                             }()
 
                             // show notification related content
-                            guard let type = Mastodon.Entity.Notification.NotificationType(rawValue: pushNotification.notificationType) else { return }
+                            guard let type = Mastodon.Entity.NotificationType(rawValue: pushNotification.notificationType) else { return }
                             guard let me = authenticationBox.cachedAccount else { return }
                             let notificationID = String(pushNotification.notificationID)
 
diff --git a/MastodonSDK/Sources/MastodonCore/Extension/MastodonSDK/Mastodon+Entity+Notification+Type.swift b/MastodonSDK/Sources/MastodonCore/Extension/MastodonSDK/Mastodon+Entity+Notification+Type.swift
index ec05ea3c70..674e2e7f9b 100644
--- a/MastodonSDK/Sources/MastodonCore/Extension/MastodonSDK/Mastodon+Entity+Notification+Type.swift
+++ b/MastodonSDK/Sources/MastodonCore/Extension/MastodonSDK/Mastodon+Entity+Notification+Type.swift
@@ -11,7 +11,7 @@ import UIKit
 import MastodonAsset
 import MastodonLocalization
 
-extension Mastodon.Entity.Notification.NotificationType {
+extension Mastodon.Entity.NotificationType {
     public var color: UIColor {
         get {
             var color: UIColor
diff --git a/MastodonSDK/Sources/MastodonCore/Service/API/APIService+Notification.swift b/MastodonSDK/Sources/MastodonCore/Service/API/APIService+Notification.swift
index 9af896130d..74cd25a723 100644
--- a/MastodonSDK/Sources/MastodonCore/Service/API/APIService+Notification.swift
+++ b/MastodonSDK/Sources/MastodonCore/Service/API/APIService+Notification.swift
@@ -26,8 +26,8 @@ extension APIService {
     ) async throws -> Mastodon.Response.Content<[Mastodon.Entity.Notification]> {
         let authorization = authenticationBox.userAuthorization
 
-        let types: [Mastodon.Entity.Notification.NotificationType]?
-        let excludedTypes: [Mastodon.Entity.Notification.NotificationType]?
+        let types: [Mastodon.Entity.NotificationType]?
+        let excludedTypes: [Mastodon.Entity.NotificationType]?
 
         switch scope {
         case .everything:
diff --git a/MastodonSDK/Sources/MastodonSDK/API/Mastodon+API+Notifications.swift b/MastodonSDK/Sources/MastodonSDK/API/Mastodon+API+Notifications.swift
index 7244c6e9c6..03e591d2c3 100644
--- a/MastodonSDK/Sources/MastodonSDK/API/Mastodon+API+Notifications.swift
+++ b/MastodonSDK/Sources/MastodonSDK/API/Mastodon+API+Notifications.swift
@@ -90,8 +90,8 @@ extension Mastodon.API.Notifications {
         public let sinceID: Mastodon.Entity.Status.ID?
         public let minID: Mastodon.Entity.Status.ID?
         public let limit: Int?
-        public let types: [Mastodon.Entity.Notification.NotificationType]?
-        public let excludeTypes: [Mastodon.Entity.Notification.NotificationType]?
+        public let types: [Mastodon.Entity.NotificationType]?
+        public let excludeTypes: [Mastodon.Entity.NotificationType]?
         public let accountID: String?
     
         public init(
@@ -99,8 +99,8 @@ extension Mastodon.API.Notifications {
             sinceID: Mastodon.Entity.Status.ID? = nil,
             minID: Mastodon.Entity.Status.ID? = nil,
             limit: Int? = nil,
-            types: [Mastodon.Entity.Notification.NotificationType]? = nil,
-            excludeTypes: [Mastodon.Entity.Notification.NotificationType]? = nil,
+            types: [Mastodon.Entity.NotificationType]? = nil,
+            excludeTypes: [Mastodon.Entity.NotificationType]? = nil,
             accountID: String? = nil
         ) {
             self.maxID = maxID
diff --git a/MastodonSDK/Sources/MastodonSDK/Entity/Mastodon+Entity+Notification.swift b/MastodonSDK/Sources/MastodonSDK/Entity/Mastodon+Entity+Notification.swift
index f29a5fff4f..953b1fd8d0 100644
--- a/MastodonSDK/Sources/MastodonSDK/Entity/Mastodon+Entity+Notification.swift
+++ b/MastodonSDK/Sources/MastodonSDK/Entity/Mastodon+Entity+Notification.swift
@@ -20,25 +20,69 @@ extension Mastodon.Entity {
         public typealias ID = String
         
         public let id: ID
-        public let type: Type
+        public let type: NotificationType
         public let createdAt: Date
+        public let groupKey: String?
         public let account: Account
         public let status: Status?
+        public let report: Report?
+//        public let relationshipSeverenceEvent: RelationshipSeveranceEvent?
         public let accountWarning: AccountWarning?
 
         enum CodingKeys: String, CodingKey {
             case id
             case type
+            case groupKey = "group_key"
             case createdAt = "created_at"
             case account
             case status
+            case report
+            case accountWarning = "moderation_warning"
+        }
+    }
+    
+    /// NotificationGroup
+    ///
+    /// - Since: 4.3.0
+    /// - Version: 4.3.0
+    /// # Last Update
+    ///   2024/12/19
+    /// # Reference
+    ///  [Document](https://docs.joinmastodon.org/methods/grouped_notifications/#NotificationGroup)
+    public struct NotificationGroup: Codable, Sendable {
+        public typealias ID = String
+        
+        public let id: ID
+        public let notificationsCount: Int
+        public let type: NotificationType
+        public let mostRecentNotificationID: ID
+        public let pageOldestID: ID? // ID of the oldest notification from this group represented within the current page. This is only returned when paginating through notification groups. Useful when polling new notifications.
+        public let pageNewestID: ID? // ID of the newest notification from this group represented within the current page. This is only returned when paginating through notification groups. Useful when polling new notifications.
+        public let latestPageNotificationAt: Date? // Date at which the most recent notification from this group within the current page has been created. This is only returned when paginating through notification groups.
+        public let sampleAccountIDs: [String] // IDs of some of the accounts who most recently triggered notifications in this group.
+        public let statusID: ID?
+        public let report: Report?
+        //        public let relationshipSeverenceEvent: RelationshipSeveranceEvent?
+        public let accountWarning: AccountWarning?
+        
+        enum CodingKeys: String, CodingKey {
+            case id = "group_key"
+            case notificationsCount = "notifications_count"
+            case type
+            case mostRecentNotificationID = "most_recent_notification_id"
+            case pageOldestID = "page_min_id"
+            case pageNewestID = "page_max_id"
+            case latestPageNotificationAt = "latest_page_notification_at"
+            case sampleAccountIDs = "sample_account_ids"
+            case statusID = "status_id"
+            case report = "report"
             case accountWarning = "moderation_warning"
         }
     }
 }
 
 extension Mastodon.Entity {
-    public struct AccountWarning: Codable {
+    public struct AccountWarning: Codable, Sendable {
         public typealias ID = String
 
         public let id: ID
@@ -57,7 +101,7 @@ extension Mastodon.Entity {
             case statusIds = "status_ids"
         }
 
-        public enum Action: String, Codable {
+        public enum Action: String, Codable, Sendable {
             case none
             case disable
             case markStatusesAsSensitive
@@ -77,11 +121,11 @@ extension Mastodon.Entity {
             }
         }
 
-        public struct Appeal: Codable {
+        public struct Appeal: Codable, Sendable {
             public let text: String
             public let state: State
 
-            public enum State: String, Codable {
+            public enum State: String, Codable, Sendable {
                 case approved
                 case rejected
                 case pending
@@ -90,9 +134,8 @@ extension Mastodon.Entity {
     }
 }
 
-extension Mastodon.Entity.Notification {
-    public typealias NotificationType = Type
-    public enum `Type`: RawRepresentable, Codable, Sendable {
+extension Mastodon.Entity {
+    public enum NotificationType: RawRepresentable, Codable, Sendable {
         case follow
         case followRequest
         case mention
@@ -143,3 +186,13 @@ extension Mastodon.Entity.Notification: Hashable {
         hasher.combine(id)
     }
 }
+
+extension Mastodon.Entity.NotificationGroup: Hashable {
+    public static func == (lhs: Mastodon.Entity.NotificationGroup, rhs: Mastodon.Entity.NotificationGroup) -> Bool {
+        lhs.id == rhs.id
+    }
+    
+    public func hash(into hasher: inout Hasher) {
+        hasher.combine(id)
+    }
+}
diff --git a/MastodonSDK/Sources/MastodonSDK/Entity/Mastodon+Entity+Report.swift b/MastodonSDK/Sources/MastodonSDK/Entity/Mastodon+Entity+Report.swift
index 5b2571206b..a6e817bbe1 100644
--- a/MastodonSDK/Sources/MastodonSDK/Entity/Mastodon+Entity+Report.swift
+++ b/MastodonSDK/Sources/MastodonSDK/Entity/Mastodon+Entity+Report.swift
@@ -16,7 +16,7 @@ extension Mastodon.Entity {
     ///   2021/1/29
     /// # Reference
     ///  [Document](https://docs.joinmastodon.org/entities/report/)
-    public struct Report: Codable {
+    public struct Report: Codable, Sendable {
         public typealias ID = String
         
         public let id: ID                   //  undocumented