diff --git a/versions/2016-10-31.md b/versions/2016-10-31.md
index 172922cfc..6b02f7fc5 100644
--- a/versions/2016-10-31.md
+++ b/versions/2016-10-31.md
@@ -1248,6 +1248,7 @@ Domain:
     HostedZoneName: String # ONE OF `HostedZoneId`, `HostedZoneName` REQUIRED | Must be the `Name` of an [`AWS::Route53::HostedZone`](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-route53-hostedzone.html) resource
     EvaluateTargetHealth: Boolean # optional | default value is false
     DistributionDomainName: String # OPTIONAL if the EndpointConfiguration is EDGE | Default points to Api Gateway Distribution | Domain name of a [cloudfront distribution](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-cloudfront-distribution.html)
+    IpV6: Boolean # optional | default value is false
 ```
 
 #### Cors Configuration Object
@@ -1309,4 +1310,4 @@ ApiKey | `restapi-logical-id`.ApiKey |`restapi-logical-id`ApiKey | SAM generates
 Property Name | Reference | LogicalId | Description
 ---|:---:|---|---
 Stage | `httpapi-logical-id`.Stage | `httpapi-logical-id`ApiGatewayDefaultStage or `httpapi-logical-id` `StageName`Stage | SAM generates `AWS::ApiGatewayV2::Stage` resource with `httpapi-logical-id`ApiGatewayDefaultStage logical id if `StageName` property is not defined. If an explicit `StageName` property is defined them SAM generates `AWS::ApiGatewayV2::Stage` resource with `httpapi-logical-id` `StageName`Stage logicalId. This resource can be referenced in intrinsic functions using `httpapi-logical-id`.Stage
-DomainName | `httpapi-logical-id`.DomainName | `domain-logical-id` | `AWS::ApiGatewayV2::DomainName` resource can be referenced by using the resource logical id or `restapi-logical-id`.DomainName when `DomainName` resource is defined in `Domain` property of `AWS::Serverless::Api`
\ No newline at end of file
+DomainName | `httpapi-logical-id`.DomainName | `domain-logical-id` | `AWS::ApiGatewayV2::DomainName` resource can be referenced by using the resource logical id or `restapi-logical-id`.DomainName when `DomainName` resource is defined in `Domain` property of `AWS::Serverless::Api`