diff --git a/infrastructure-as-code/aws-ec2-instance/main.tf b/infrastructure-as-code/aws-ec2-instance/main.tf
index 7c002a141..22fe3b907 100644
--- a/infrastructure-as-code/aws-ec2-instance/main.tf
+++ b/infrastructure-as-code/aws-ec2-instance/main.tf
@@ -1,5 +1,5 @@
 terraform {
-  required_version = ">= 0.11.0"
+  required_version = ">= 0.11.7"
 }
 
 provider "aws" {
@@ -9,7 +9,7 @@ provider "aws" {
 resource "aws_instance" "ubuntu" {
   ami           = "${var.ami_id}"
   instance_type = "${var.instance_type}"
-  availability_zone = "${var.aws_region}a"
+  availability_zone = "${var.aws_region}"
 
   tags {
     Name = "${var.name}"
diff --git a/infrastructure-as-code/aws-ec2-instance/variables.tf b/infrastructure-as-code/aws-ec2-instance/variables.tf
index 5a8cb11c5..0b4e14692 100644
--- a/infrastructure-as-code/aws-ec2-instance/variables.tf
+++ b/infrastructure-as-code/aws-ec2-instance/variables.tf
@@ -1,19 +1,25 @@
+resource "null_resource" "example1" {
+  provisioner "local-exec" {
+    command = "tree"
+  }
+}
+
 variable "aws_region" {
   description = "AWS region"
-  default = "us-west-1"
+  default = "eu-west-2"
 }
 
 variable "ami_id" {
-  description = "ID of the AMI to provision. Default is Ubuntu 14.04 Base Image"
-  default = "ami-2e1ef954"
+  description = "ID of the AMI to provision. Default is CentOS Hashistack Base Image"
+  default = "ami-03a0ef6f0d2067f46"
 }
 
 variable "instance_type" {
   description = "type of EC2 instance to provision."
-  default = "t2.micro"
+  default = "m4.large"
 }
 
 variable "name" {
   description = "name to pass to Name tag"
-  default = "Provisioned by Terraform"
+  default = "demo-vm-jboero"
 }