diff --git a/packages/AdaptiveCards/Actions/UpdateAdaptiveCard.cs b/packages/AdaptiveCards/Actions/UpdateAdaptiveCard.cs
index e70c3c9980..ac0a8a8b56 100644
--- a/packages/AdaptiveCards/Actions/UpdateAdaptiveCard.cs
+++ b/packages/AdaptiveCards/Actions/UpdateAdaptiveCard.cs
@@ -34,6 +34,7 @@ protected async override Task<object> OnProcessCardAsync(DialogContext dc, JObje
                 }
 
                 // Update existing activity
+                activity.Id = activityId;
                 await dc.Context.UpdateActivityAsync(activity, cancellationToken).ConfigureAwait(false);
             }
             else
diff --git a/packages/AdaptiveCards/Schemas/Microsoft.Bot.Components.UpdateAdaptiveCard.schema b/packages/AdaptiveCards/Schemas/Microsoft.Bot.Components.UpdateAdaptiveCard.schema
index b51cb2b73e..2f2cde9e64 100644
--- a/packages/AdaptiveCards/Schemas/Microsoft.Bot.Components.UpdateAdaptiveCard.schema
+++ b/packages/AdaptiveCards/Schemas/Microsoft.Bot.Components.UpdateAdaptiveCard.schema
@@ -40,7 +40,7 @@
       "$ref": "schema:#/definitions/stringExpression",
       "title": "Activity ID",
       "description": "ID of the cards activity to update.  Required unless sending a response to an invoked Action.Execute.",
-      "default": "=turn.activity.replyTo"
+      "default": "=turn.activity.replyToId"
     }
   },
   "required": [ "template", "data" ]