diff --git a/rest/Endpoints.ts b/rest/Endpoints.ts
index 8114a62..c560b91 100644
--- a/rest/Endpoints.ts
+++ b/rest/Endpoints.ts
@@ -363,6 +363,67 @@ export default class Endpoints {
     return `/guilds/${guildID}/templates/${code}`;
   }
 
+  // Threads
+  /**
+   * `/channels/:channelID/messages/:messageID/threads`
+   * - POST - Start Thread with Message
+   */
+  public static START_THREAD_WITH_MESSAGE(channelID: string, messageID: string) {
+    return `/channels/${channelID}/messages/${messageID}/threads`;
+  }
+  /**
+   * `/channels/:channelID/threads`
+   * - POST - Start Thread without Message
+   */
+  public static START_THREAD_WITHOUT_MESSAGE(channelID: string) {
+    return `/channels/${channelID}/threads`;
+  }
+  /**
+   * `/channels/:channelID/thread-members/@me`
+   * - PUT - Join Thread
+   * - DELETE - Leave Thread
+   */
+  public static THREAD(channelID: string) {
+    return `/channels/${channelID}/thread-members/@me`;
+  }
+  /**
+   * `/channels/:channelID/thread-members/:userID`
+   * - PUT - Add Thread Member
+   * - DELETE - Remove Thread Member
+   */
+  public static THREAD_MEMBER(channelID: string, userID: string) {
+    return `/channels/${channelID}/thread-members/${userID}`;
+  }
+  /**
+   * `/channels/:channelID/thread-members`
+   * - GET - List Thread Members
+   */
+  public static LIST_THREAD_MEMBERS(channelID: string) {
+    return `/channels/${channelID}/thread-members`;
+  }
+  /**
+   * `/channels/:channelID/threads/active`
+   * - GET - List Active Threads
+   */
+  public static LIST_ACTIVE_THREADS(channelID: string) {
+    return `/channels/${channelID}/threads/active`;
+  }
+  /**
+   * `/channels/:channelID}/threads/archived/public OR private`
+   * - GET & type = public - List Public Archived Threads
+   * - GET & type = private - List Private Archived Threads
+   */
+  public static LIST_ARCHIVED_THREADS(channelID: string, type: 'public' | 'private') {
+    return `/channels/${channelID}/threads/archived/${type}`;
+  }
+  /**
+   * `/channels/:channelID/users/@me/threads/archived/private`
+   * - GET - List Joined Private Archived Threads
+   */
+  public static LIST_JOINED_PRIVATE_ARCHIVED_THREADS(channelID: string) {
+    return `/channels/${channelID}/users/@me/threads/archived/private`;
+  }
+
   // User
   /**
    * `/users/:userID`
diff --git a/rest/RESTClient.ts b/rest/RESTClient.ts
index 0a8285c..50b1ffa 100644
--- a/rest/RESTClient.ts
+++ b/rest/RESTClient.ts
@@ -9,7 +9,7 @@ import { REST_CONSTANTS } from '../src/util/Constants';
 const { version, repository } = require('../../package.json');
 
 export default class RESTClient {
-  version = 'v8';
+  version = 'v9';
   apiURL = `/api/${this.version}`;// eslint-disable-line @typescript-eslint/member-ordering
   readonly client: Client;
   globallyRateLimited = false;
diff --git a/structures/Guild.ts b/structures/Guild.ts
index 1ef28bf..2f70b18 100644
--- a/structures/Guild.ts
+++ b/structures/Guild.ts
@@ -42,6 +42,7 @@ export default interface Guild extends Base {
   splash: string | null;
   system_channel_flags: SystemChannelFlags;
   system_channel_id: string | null;
+  threads?: Channel[];
   unavailable?: boolean;
   vanity_url_code: string | null;
   verification_level: VerificationLevel;
diff --git a/ws/constants.ts b/ws/constants.ts
index 1f1f355..2cb900a 100644
--- a/ws/constants.ts
+++ b/ws/constants.ts
@@ -31,6 +31,12 @@ export const EVENTS = {
   MESSAGE_REACTION_REMOVE_EMOJI: 'messageReactionRemoveEmoji',
   PRESENCE_UPDATE: 'presenceUpdate',
   TYPING_START: 'typingStart',
+  THREAD_CREATE: 'threadCreate',
+  THREAD_UPDATE: 'threadUpdate',
+  THREAD_DELETE: 'threadDelete',
+  THREAD_LIST_SYNC: 'threadListSync',
+  THREAD_MEMBER_UPDATE: 'threadMemberUpdate',
+  THREAD_MEMBERS_UPDATE: 'threadMembersUpdate',
   USER_UPDATE: 'userUpdate',
   VOICE_STATE_UPDATE: 'voiceStateUpdate',
   VOICE_SERVER_UPDATE: 'guildServerUpdate',