diff --git a/README.md b/README.md
index dc27a4f..8c31477 100644
--- a/README.md
+++ b/README.md
@@ -205,6 +205,7 @@ Before you begin using this Terraform module, ensure you meet the following prer
 | sns\_key\_spec | Specification of the Key. | `string` | `"SYMMETRIC_DEFAULT"` | no |
 | sns\_key\_enabled | Specifies whether the key is enabled. | `bool` | `true` | no |
 | sns\_rotation\_enabled | Specifies whether key rotation is enabled. | `bool` | `true` | no |
+| fqdn\_url | Define custom domain name for the Route53 Health check | `string` | `""` | no |
 <!-- END_TF_DOCS -->
 
 ## Usage