diff --git a/docs/architecture.png b/docs/architecture.png
index 74855df..eae0ef1 100644
Binary files a/docs/architecture.png and b/docs/architecture.png differ
diff --git a/terraform/modules/acm/variables.tf b/terraform/modules/acm/variables.tf
index b51b74c..8958320 100644
--- a/terraform/modules/acm/variables.tf
+++ b/terraform/modules/acm/variables.tf
@@ -5,7 +5,6 @@
 variable "domain_name" {
   description = "A domain name for which the certificate should be issued"
   type        = string
-  default     = ""
 }
 
 variable "subject_alternative_names" {