diff --git a/README.md b/README.md
index d724a61..9cabc2e 100644
--- a/README.md
+++ b/README.md
@@ -223,7 +223,7 @@ module "ecs_app" {
 | Name | Description |
 |------|-------------|
 | <a name="output_alb_listener_arns"></a> [alb\_listener\_arns](#output\_alb\_listener\_arns) | The ARN of the ALB listeners. |
-| <a name="output_ecs_service_security_group_id"></a> [ecs\_service\_security\_group\_id](#output\_ecs\_service\_security\_group\_id) | n/a |
+| <a name="output_ecs_service_security_group_id"></a> [ecs\_service\_security\_group\_id](#output\_ecs\_service\_security\_group\_id) | The ID of the Security Group ECS service. |
 | <a name="output_service_arn"></a> [service\_arn](#output\_service\_arn) | ECS Service ARN |
 | <a name="output_service_name"></a> [service\_name](#output\_service\_name) | ECS Service name |
 | <a name="output_task_definition_family"></a> [task\_definition\_family](#output\_task\_definition\_family) | ECS task definition family |
diff --git a/outputs.tf b/outputs.tf
index 6dc49eb..318d47a 100644
--- a/outputs.tf
+++ b/outputs.tf
@@ -24,5 +24,6 @@ output "alb_listener_arns" {
 }
 
 output "ecs_service_security_group_id" {
-  value = module.ecs_service_sg.id
+  description = "The ID of the Security Group ECS service."
+  value       = module.ecs_service_sg.id
 }