diff --git a/examples/message-extensions/src/card.ts b/examples/message-extensions/src/card.ts
index 7f404c196..dd13e2276 100644
--- a/examples/message-extensions/src/card.ts
+++ b/examples/message-extensions/src/card.ts
@@ -1,4 +1,4 @@
-import { Account, Message, ThumbnailCard } from '@microsoft/teams.api';
+import { Account, Message, TeamsChannelAccount, ThumbnailCard } from '@microsoft/teams.api';
 import {
   ActionSet,
   AdaptiveCard,
@@ -108,7 +108,7 @@ export function createMessageDetailsCard(messagePayload: Message) {
   return new AdaptiveCard(...cardElements);
 }
 
-export function createConversationMembersCard(members: Account[]) {
+export function createConversationMembersCard(members: (Account | TeamsChannelAccount)[]) {
   const membersList = members.map((member) => member.name).join(', ');
 
   return new AdaptiveCard(
@@ -157,7 +157,7 @@ export async function createDummyCards(searchQuery: string) {
         // When a user clicks on a list item in Teams:
         // - If the thumbnail has a `tap` property: Teams will trigger the `message.ext.select-item` activity
         // - If no `tap` property: Teams will insert the full adaptive card into the compose box
-        // tap: { 
+        // tap: {
         //   type: "invoke",
         //   title: item.title,
         //   value: {
diff --git a/package-lock.json b/package-lock.json
index 0af3ce140..205c6581a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,7 +13,7 @@
         "examples/*"
       ],
       "devDependencies": {
-        "@changesets/cli": "*",
+        "@changesets/cli": "latest",
         "@turbo/gen": "^2.5.7",
         "bluehawk": "^1.6.0",
         "turbo": "^2.4.0",
diff --git a/packages/api/src/activities/event/meeting-participant-join.ts b/packages/api/src/activities/event/meeting-participant-join.ts
index a51043305..4830da14c 100644
--- a/packages/api/src/activities/event/meeting-participant-join.ts
+++ b/packages/api/src/activities/event/meeting-participant-join.ts
@@ -1,4 +1,4 @@
-import { Account } from '../../models';
+import { TeamsChannelAccount } from '../../models';
 import { IActivity } from '../activity';
 
 export interface IMeetingParticipantJoinEventActivity extends IActivity<'event'> {
@@ -18,7 +18,7 @@ export interface IMeetingParticipantJoinEventActivity extends IActivity<'event'>
       /**
        * The participant account.
        */
-      user: Account;
+      user: TeamsChannelAccount;
 
       /**
        * The participants info.
diff --git a/packages/api/src/activities/event/meeting-participant-leave.ts b/packages/api/src/activities/event/meeting-participant-leave.ts
index 2d9c5ba78..c04c7d4ee 100644
--- a/packages/api/src/activities/event/meeting-participant-leave.ts
+++ b/packages/api/src/activities/event/meeting-participant-leave.ts
@@ -1,4 +1,4 @@
-import { Account } from '../../models';
+import { TeamsChannelAccount } from '../../models';
 import { IActivity } from '../activity';
 
 export interface IMeetingParticipantLeaveEventActivity extends IActivity<'event'> {
@@ -18,7 +18,7 @@ export interface IMeetingParticipantLeaveEventActivity extends IActivity<'event'
       /**
        * The participant account.
        */
-      user: Account;
+      user: TeamsChannelAccount;
 
       /**
        * The participants info.
diff --git a/packages/api/src/clients/conversation/member.ts b/packages/api/src/clients/conversation/member.ts
index 9df38316e..bad8fab09 100644
--- a/packages/api/src/clients/conversation/member.ts
+++ b/packages/api/src/clients/conversation/member.ts
@@ -1,6 +1,6 @@
 import { Client, ClientOptions } from '@microsoft/teams.common/http';
 
-import { Account } from '../../models';
+import { TeamsChannelAccount } from '../../models';
 import { ApiClientSettings, mergeApiClientSettings } from '../api-client-settings';
 
 export class ConversationMemberClient {
@@ -29,14 +29,14 @@ export class ConversationMemberClient {
   }
 
   async get(conversationId: string) {
-    const res = await this.http.get<Account[]>(
+    const res = await this.http.get<TeamsChannelAccount[]>(
       `${this.serviceUrl}/v3/conversations/${conversationId}/members`
     );
     return res.data;
   }
 
   async getById(conversationId: string, id: string) {
-    const res = await this.http.get<Account>(
+    const res = await this.http.get<TeamsChannelAccount>(
       `${this.serviceUrl}/v3/conversations/${conversationId}/members/${id}`
     );
     return res.data;
diff --git a/packages/api/src/models/account.ts b/packages/api/src/models/account.ts
index a39055569..d7aeea1be 100644
--- a/packages/api/src/models/account.ts
+++ b/packages/api/src/models/account.ts
@@ -10,6 +10,63 @@ export type Account<P = any> = {
   readonly membershipSources?: MembershipSource[];
 };
 
+/**
+ * Represents a Teams channel account, extending the basic channel account with Teams-specific properties.
+ * This is used to represent a user or bot in Microsoft Teams conversations.
+ * @see https://learn.microsoft.com/en-us/dotnet/api/microsoft.bot.schema.teams.teamschannelaccount
+ */
+export type TeamsChannelAccount<P = any> = {
+  /**
+   * @member {string} [id] Unique identifier for the user or bot in the channel.
+   */
+  readonly id: string;
+
+  /**
+   * @member {string} [name] Display-friendly name of the user or bot.
+   */
+  readonly name: string;
+
+  /**
+   * @member {string} [objectId] The user's Object ID in Azure Active Directory (AAD).
+   */
+  readonly objectId?: string;
+
+  /**
+   * @member {Role} [userRole] Role of the user (e.g., 'user' or 'bot').
+   */
+  readonly userRole: Role;
+
+  /**
+   * @member {string} [givenName] Given name (first name) of the user.
+   */
+  readonly givenName?: string;
+
+  /**
+   * @member {string} [surname] Surname (last name) of the user.
+   */
+  readonly surname?: string;
+
+  /**
+   * @member {string} [email] Email address of the user.
+   */
+  readonly email?: string;
+
+  /**
+   * @member {string} [userPrincipalName] Unique User Principal Name (UPN) for the user in AAD.
+   */
+  readonly userPrincipalName?: string;
+
+  /**
+   * @member {string} [tenantId] Unique identifier for the user's Azure AD tenant.
+   */
+  readonly tenantId?: string;
+
+  /**
+   * @member {P} [properties] Custom properties associated with the account.
+   */
+  readonly properties?: P;
+};
+
 export type ConversationAccount = {
   readonly id: string;
   readonly tenantId?: string;
diff --git a/packages/api/src/models/meeting/meeting-info.ts b/packages/api/src/models/meeting/meeting-info.ts
index 94812a365..e6186e88a 100644
--- a/packages/api/src/models/meeting/meeting-info.ts
+++ b/packages/api/src/models/meeting/meeting-info.ts
@@ -1,4 +1,4 @@
-import { Account, ConversationAccount } from '../account';
+import { ConversationAccount, TeamsChannelAccount } from '../account';
 
 import { MeetingDetails } from './meeting-details';
 
@@ -25,5 +25,5 @@ export type MeetingInfo = {
   /**
    * @member {TeamsChannelAccount} [organizer] The organizer's user information.
    */
-  organizer?: Account;
+  organizer?: TeamsChannelAccount;
 };
diff --git a/packages/api/src/models/meeting/meeting-participant.ts b/packages/api/src/models/meeting/meeting-participant.ts
index f8ae8d1b6..89a8f269b 100644
--- a/packages/api/src/models/meeting/meeting-participant.ts
+++ b/packages/api/src/models/meeting/meeting-participant.ts
@@ -1,4 +1,4 @@
-import { Account, ConversationAccount } from '../account';
+import { ConversationAccount, TeamsChannelAccount } from '../account';
 
 import { Meeting } from './meeting';
 
@@ -11,7 +11,7 @@ export type MeetingParticipant = {
   /**
    * @member {TeamsChannelAccount} [user] The user details
    */
-  user?: Account;
+  user?: TeamsChannelAccount;
 
   /**
    * @member {Meeting} [meeting] The meeting details.