diff --git a/data.tf b/data.tf
index 29d2011..248a8e0 100644
--- a/data.tf
+++ b/data.tf
@@ -10,8 +10,3 @@ data "vsphere_compute_cluster" "cluster" {
   name          = var.cluster_name
   datacenter_id = data.vsphere_datacenter.dc.id
 }
-
-data "vsphere_host" "host" {
-  name          = "esxi101.bsdserver.lan"
-  datacenter_id = data.vsphere_datacenter.dc.id
-}
diff --git a/provider.tf b/provider.tf
index 6442cb3..ecf6289 100644
--- a/provider.tf
+++ b/provider.tf
@@ -1,10 +1,14 @@
 terraform {
+  required_version = ">= 1.0"
+
   required_providers {
     vsphere = {
-      source = "vmware/vsphere"
+      source  = "vmware/vsphere"
+      version = "~> 2.0"
     }
     vault = {
-      source = "hashicorp/vault"
+      source  = "hashicorp/vault"
+      version = "~> 5.0"
     }
   }
 }
diff --git a/variables.tf b/variables.tf
index f8c79fb..b301dc8 100644
--- a/variables.tf
+++ b/variables.tf
@@ -55,36 +55,3 @@ variable "secret_id" {
     type = string
     sensitive = true
 }
-
-# Domain
-variable "domain" {
-  description = "Domain name"
-  type        = string
-  default     = ""
-}
-
-# ESXi Hosts
-variable "esxi_hosts" {
-  description = "Map of ESXi hosts configuration"
-  type = map(object({
-    name       = string
-    ip_address = string
-    tags       = optional(map(string), {})
-  }))
-  default = {}
-}
-
-# Port Groups
-variable "port_groups" {
-  description = "Map of port groups configuration"
-  type = map(object({
-    vlan_id           = number
-    allow_promiscuous = optional(bool, false)
-    subnet_address    = string
-    subnet_mask       = number
-    gateway_ip        = string
-    nameserver_id     = number
-    hosts             = list(string)
-  }))
-  default = {}
-}