diff --git a/_variables.tf b/_variables.tf
index c170da7..d7ea4eb 100644
--- a/_variables.tf
+++ b/_variables.tf
@@ -3,11 +3,6 @@ variable "name" {
   type        = string
 }
 
-variable "cluster_name" {
-  description = "Name of existing ECS Cluster to deploy this app to"
-  type        = string
-}
-
 variable "hostnames" {
   description = "Hostnames to create DNS record for this app that the cloudfront distribution will accept"
   type        = list(string)
@@ -49,12 +44,6 @@ variable "certificate_arn" {
   type        = string
 }
 
-variable "cloudfront_web_acl_id" {
-  default     = ""
-  description = "Optional web acl (WAF) to attach to CloudFront"
-  type        = string
-}
-
 variable "cloudfront_forward_headers" {
   default     = ["*"]
   description = "Headers to forward to origin from CloudFront"
@@ -171,12 +160,6 @@ variable "wafv2_rate_limit_rule" {
   description = "The limit on requests per 5-minute period for a single originating IP address (leave 0 to disable)"
 }
 
-variable "web_acl_id" {
-  type        = string
-  description = "Web ACL ARN for Cloudfront distribution"
-  default     = null
-}
-
 variable "record_type" {
   type        = string
   description = "Type of the record to create on Route53"
diff --git a/versions.tf b/versions.tf
index 12ad22a..8a8376d 100644
--- a/versions.tf
+++ b/versions.tf
@@ -1,3 +1,9 @@
 terraform {
-  required_version = ">= 1.3.0"
+  required_version   = ">= 1.3.0"
+  required_providers = {
+    aws = {
+      source  = "hashicorp/aws"
+      version = ">= 3.0.0"
+    }
+  }
 }