diff --git a/libraries/botbuilder-dialogs/src/skillDialog.ts b/libraries/botbuilder-dialogs/src/skillDialog.ts
index 9e387183f7..3ee369bcf9 100644
--- a/libraries/botbuilder-dialogs/src/skillDialog.ts
+++ b/libraries/botbuilder-dialogs/src/skillDialog.ts
@@ -11,6 +11,7 @@ import {
     ActivityTypes,
     ConversationReference,
     DeliveryModes,
+    ExpectedReplies,
     SkillConversationIdFactoryOptions,
     TurnContext
 } from 'botbuilder-core';
@@ -182,7 +183,7 @@ export class SkillDialog extends Dialog {
         const skillInfo = this.dialogOptions.skill;
         await this.dialogOptions.conversationState.saveChanges(context, true);
 
-        const response = await this.dialogOptions.skillClient.postActivity<Activity[]>(this.dialogOptions.botId, skillInfo.appId, skillInfo.skillEndpoint, this.dialogOptions.skillHostEndpoint, skillConversationId, activity);
+        const response = await this.dialogOptions.skillClient.postActivity<ExpectedReplies>(this.dialogOptions.botId, skillInfo.appId, skillInfo.skillEndpoint, this.dialogOptions.skillHostEndpoint, skillConversationId, activity);
 
         // Inspect the skill response status
         if (!(response.status >= 200 && response.status <= 299)) {
@@ -190,10 +191,10 @@ export class SkillDialog extends Dialog {
         }
 
         let eocActivity: Activity;
-        if (activity.deliveryMode == DeliveryModes.ExpectReplies && response.body) {
+        if (activity.deliveryMode == DeliveryModes.ExpectReplies && response.body && response.body.activities) {
             // Process replies in the response.Body.
-            if (Array.isArray(response.body)) {
-                response.body.forEach(async (fromSkillActivity: Activity): Promise<void> => {
+            if (Array.isArray(response.body.activities)) {
+                response.body.activities.forEach(async (fromSkillActivity: Activity): Promise<void> => {
                     if (fromSkillActivity.type === ActivityTypes.EndOfConversation) {
                         // Capture the EndOfConversation activity if it was sent from skill
                         eocActivity = fromSkillActivity;
diff --git a/libraries/botbuilder/src/botFrameworkAdapter.ts b/libraries/botbuilder/src/botFrameworkAdapter.ts
index 3ab5d282c1..a503b5d8f4 100644
--- a/libraries/botbuilder/src/botFrameworkAdapter.ts
+++ b/libraries/botbuilder/src/botFrameworkAdapter.ts
@@ -9,7 +9,7 @@
 import { STATUS_CODES } from 'http';
 import * as os from 'os';
 
-import { Activity, ActivityTypes, BotAdapter, BotCallbackHandlerKey, ChannelAccount, ConversationAccount, ConversationParameters, ConversationReference, ConversationsResult, DeliveryModes,InvokeResponse, ExtendedUserTokenProvider, ResourceResponse, StatusCodes, TokenResponse, TurnContext } from 'botbuilder-core';
+import { Activity, ActivityTypes, BotAdapter, BotCallbackHandlerKey, ChannelAccount, ConversationAccount, ConversationParameters, ConversationReference, ConversationsResult, DeliveryModes, ExpectedReplies, InvokeResponse, ExtendedUserTokenProvider, ResourceResponse, StatusCodes, TokenResponse, TurnContext } from 'botbuilder-core';
 import { AuthenticationConfiguration, AuthenticationConstants, ChannelValidation, Claim, ClaimsIdentity, ConnectorClient, EmulatorApiClient, GovernmentConstants, GovernmentChannelValidation, JwtTokenValidation, MicrosoftAppCredentials, AppCredentials, CertificateAppCredentials, SimpleCredentialProvider, TokenApiClient, TokenStatus, TokenApiModels, SignInUrlResponse, SkillValidation, TokenExchangeRequest } from 'botframework-connector';
 
 import { INodeBuffer, INodeSocket, IReceiveRequest, ISocket, IStreamingTransportServer, NamedPipeServer, NodeWebSocketFactory, NodeWebSocketFactoryBase, RequestHandler, StreamingResponse, WebSocketServer } from 'botframework-streaming';
@@ -838,7 +838,8 @@ export class BotFrameworkAdapter extends BotAdapter implements ExtendedUserToken
                     status = 501;
                 }
             } else if (request.deliveryMode === DeliveryModes.ExpectReplies) {
-                body = context.bufferedReplyActivities;
+                const expectedReplies: ExpectedReplies = { activities: context.bufferedReplyActivities as Activity[]  };
+                body = expectedReplies;
                 status = StatusCodes.OK;
             } else {
                 status = 200;
@@ -1272,7 +1273,8 @@ export class BotFrameworkAdapter extends BotAdapter implements ExtendedUserToken
                     response.statusCode = StatusCodes.NOT_IMPLEMENTED;
                 }
             } else if (body.deliveryMode === DeliveryModes.ExpectReplies) {
-                response.setBody(context.bufferedReplyActivities);
+                const replies: ExpectedReplies = { activities : context.bufferedReplyActivities as Activity[] };
+                response.setBody(replies);
                 response.statusCode = StatusCodes.OK;
             } else {
                 response.statusCode = StatusCodes.OK;
diff --git a/libraries/botframework-connector/src/connectorApi/models/mappers.ts b/libraries/botframework-connector/src/connectorApi/models/mappers.ts
index 730c3c0a56..40f6136b5b 100644
--- a/libraries/botframework-connector/src/connectorApi/models/mappers.ts
+++ b/libraries/botframework-connector/src/connectorApi/models/mappers.ts
@@ -956,6 +956,28 @@ export const ConversationsResult: msRest.CompositeMapper = {
   }
 };
 
+export const ExpectedReplies: msRest.CompositeMapper = {
+  serializedName: "ExpectedReplies",
+  type: {
+    name: "Composite",
+    className: "ExpectedReplies",
+    modelProperties: {
+      activities: {
+        serializedName: "activities",
+        type: {
+          name: "Sequence",
+          element: {
+            type: {
+              name: "Composite",
+              className: "Activity"
+            }
+          }
+        }
+      }
+    }
+  }
+};
+
 export const ResourceResponse: msRest.CompositeMapper = {
   serializedName: "ResourceResponse",
   type: {
diff --git a/libraries/botframework-schema/src/index.ts b/libraries/botframework-schema/src/index.ts
index 3a8a52676e..cfc36305b0 100644
--- a/libraries/botframework-schema/src/index.ts
+++ b/libraries/botframework-schema/src/index.ts
@@ -579,6 +579,16 @@ export interface ConversationsResult {
   conversations: ConversationMembers[];
 }
 
+/**
+ * Expected Replies in response to DeliveryModes.ExpectReplies
+ */
+export interface ExpectedReplies {
+  /**
+   * A collection of Activities that conforms to the ExpectedReplies schema.
+   */
+  activities: Activity[];
+}
+
 /**
  * A response containing a resource ID
  */
diff --git a/libraries/testskills/skillparent/parentBot.js b/libraries/testskills/skillparent/parentBot.js
index b3a6753e0e..ea0b1eab43 100644
--- a/libraries/testskills/skillparent/parentBot.js
+++ b/libraries/testskills/skillparent/parentBot.js
@@ -69,7 +69,7 @@ class ParentBot extends ActivityHandler {
 
                 if (response.status == 200)
                 {
-                    await context.sendActivities(response.body);
+                    await context.sendActivities(response.body.activities);
                 }
 
                 await context.sendActivity('parent: after child');