diff --git a/variables.tf b/variables.tf
index b06bde1..158959a 100644
--- a/variables.tf
+++ b/variables.tf
@@ -1,6 +1,5 @@
-
 variable "domain" {
-  type        = string
+  type        = list(string)
   description = "domain full name"
 }
 
@@ -15,4 +14,3 @@ variable "waf" {
   default     = null
   description = "waf configs"
 }
-
diff --git a/waf.tf b/waf.tf
index 171315f..3de541b 100644
--- a/waf.tf
+++ b/waf.tf
@@ -17,7 +17,7 @@ module "waf" {
 
   providers = {
     // TODO: for cloudfront distribution the waf gets created in virginia, but for alb the specific region should be used,
-    // needs to decide how to accomplish this  
+    // needs to decide how to accomplish this
     aws = aws.virginia
   }
 }