diff --git a/examples/basic/main.tf b/examples/basic/main.tf
index ddeb63b..9320d8b 100644
--- a/examples/basic/main.tf
+++ b/examples/basic/main.tf
@@ -13,7 +13,7 @@ locals {
   # version used for both main AKS API service, and default node pool
   # https://github.com/Azure/AKS/releases
   # az aks get-versions --location uksouth --output table
-  kubernetes_version  = "1.17.16"
+  kubernetes_version  = "1.18.14"
   location            = "uksouth"
   resource_group_name = "${random_string.aks.result}-rg-azurerm-kubernetes-cluster"
   name                = "${random_string.aks.result}-aks-cluster"
diff --git a/main.tf b/main.tf
index d286c8a..d9e7448 100644
--- a/main.tf
+++ b/main.tf
@@ -1,24 +1,3 @@
-terraform {
-  # versioning syntax: https://www.terraform.io/docs/configuration/version-constraints.html#version-constraint-syntax
-  required_version = ">= 0.12"
-
-  # providers (pin all versions)
-  # versioning syntax: https://www.terraform.io/docs/configuration/modules.html#module-versions
-  # ~> 1.0 = 1.x
-  required_providers {
-    # https://github.com/terraform-providers/terraform-provider-azuread/releases
-    azuread = "~> 1.0"
-    random  = "~> 2.2"
-    tls     = "~> 2.1"
-  }
-}
-
-# https://github.com/terraform-providers/terraform-provider-azurerm/releases
-provider "azurerm" {
-  version = "~> 2.20"
-  features {}
-}
-
 locals {
   # TODO: consider moving defaults to object var, as per: https://binx.io/blog/2020/01/02/module-parameter-defaults-with-the-terraform-object-type/
   default_agent_profile = {
diff --git a/test/README.md b/test/README.md
index ab95562..3a0982d 100644
--- a/test/README.md
+++ b/test/README.md
@@ -20,10 +20,7 @@ cd test
 terraform init
 terraform validate
 
-# Plan
-terraform plan
-
-# Apply
+# Plan / Apply
 terraform apply
 
 # Outputs
diff --git a/test/main.tf b/test/main.tf
index 8d6e7d3..42389c5 100644
--- a/test/main.tf
+++ b/test/main.tf
@@ -1,14 +1,9 @@
 # Test AKS module
-provider "azurerm" {
-  version = "2.47.0"
-  features {}
-}
-
 locals {
   # version used for both main AKS API service, and default node pool
   # https://github.com/Azure/AKS/releases
   # az aks get-versions --location uksouth --output table
-  kubernetes_version  = "1.17.16"
+  kubernetes_version  = "1.18.14"
   prefix              = "rush"
   location            = "uksouth"
   resource_group_name = "${local.prefix}-rg-azurerm-kubernetes-cluster"
diff --git a/test/versions.tf b/test/versions.tf
new file mode 100644
index 0000000..d2fda6e
--- /dev/null
+++ b/test/versions.tf
@@ -0,0 +1,14 @@
+terraform {
+  required_version = ">= 0.13"
+
+  required_providers {
+    azurerm = {
+      source  = "hashicorp/azurerm"
+      version = "2.53.0"
+    }
+  }
+}
+
+provider "azurerm" {
+  features {}
+}
diff --git a/variables.tf b/variables.tf
index c15e030..b708d55 100644
--- a/variables.tf
+++ b/variables.tf
@@ -24,7 +24,7 @@ variable "aks_admin_group_member_name" {
 variable "kubernetes_version" {
   description = "Version for both main AKS API service, and default node pool"
   type        = string
-  default     = "1.17.16"
+  default     = "1.18.14"
 }
 
 variable "sla_sku" {
diff --git a/versions.tf b/versions.tf
new file mode 100644
index 0000000..9a55706
--- /dev/null
+++ b/versions.tf
@@ -0,0 +1,35 @@
+terraform {
+  # versioning syntax: https://www.terraform.io/docs/configuration/version-constraints.html#version-constraint-syntax
+  required_version = ">= 0.13"
+
+  # versioning syntax: https://www.terraform.io/docs/configuration/modules.html#module-versions
+  # ~> 1.0 = 1.x
+  required_providers {
+
+    # https://github.com/terraform-providers/terraform-provider-azurerm/releases
+    azurerm = {
+      source  = "hashicorp/azurerm"
+      version = "~> 2.0"
+    }
+
+    # https://github.com/terraform-providers/terraform-provider-azuread/releases
+    azuread = {
+      source  = "hashicorp/azuread"
+      version = "~> 1.0"
+    }
+
+    random = {
+      source  = "hashicorp/random"
+      version = "~> 2.0"
+    }
+
+    tls = {
+      source  = "hashicorp/tls"
+      version = "~> 2.0"
+    }
+  }
+}
+
+provider "azurerm" {
+  features {}
+}