diff --git a/README.md b/README.md
index 37dcda6..d0926ee 100644
--- a/README.md
+++ b/README.md
@@ -11,4 +11,5 @@ terraform apply
 # Requirements:
 
  - existing route53 zone in AWS
- - terraform v0.12.16 or newer
+ - terraform v0.13.1 or newer
+ - AWS provider 3.4.x
diff --git a/provider.tf b/provider.tf
index 4e4b65a..29c1da5 100644
--- a/provider.tf
+++ b/provider.tf
@@ -1,7 +1,14 @@
 # AWS account that contains the route53 domain
 provider "aws" {
   alias = "account_route53" # Specific to your setup
+  version = ">= 3.4.0"
 }
 
 # your normal provider
-provider "aws" {}
+provider "aws" {
+  version = ">= 3.4.0"
+}
+
+terraform {
+  required_version = ">= 0.13.1"
+}
diff --git a/vars.tf b/vars.tf
index 1dfd918..7759a66 100644
--- a/vars.tf
+++ b/vars.tf
@@ -1,10 +1,9 @@
 variable "demo_dns_zone" {
   description = "Specific to your setup, pick a domain you have in route53"
-  default     = "lab.oss.nz."
 }
 
 
 variable "demo_dns_name" {
   description = "Just a demo domain name"
   default     = "ssldemo"
-}
\ No newline at end of file
+}