diff --git a/CHANGELOG.md b/CHANGELOG.md
index 97e2b2a..7aceeb5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+
+- Update `proxmox` provider to `3.0.1-rc4`.
+- Refactor disks implementation for upstream provider.
+
 ## [1.8.0] - 2023-04-03
 
 ### Added
diff --git a/instance.tf b/instance.tf
index bec6999..5f12aa1 100644
--- a/instance.tf
+++ b/instance.tf
@@ -9,7 +9,7 @@ resource "proxmox_vm_qemu" "proxmox_instance" {
   pxe      = var.pxe_boot
   boot     = var.boot
   onboot   = var.onboot
-  oncreate = var.oncreate
+  vm_state = var.vm_state
 
   agent = var.qemu_agent
 
@@ -37,14 +37,17 @@ resource "proxmox_vm_qemu" "proxmox_instance" {
   dynamic "disk" {
     for_each = var.disks
     content {
-      type    = disk.value.type
-      storage = disk.value.storage
-      size    = disk.value.size
+      discard    = disk.value.discard
+      emulatessd = disk.value.emulatessd
+      iothread   = disk.value.iothread
+      size       = disk.value.size
+      slot       = disk.value.slot
+      storage    = disk.value.storage
+      type       = disk.value.type
     }
   }
 
   os_type  = var.pxe_boot == true ? null : var.os_type
   cicustom = var.pxe_boot == true ? null : var.cicustom
   # example: "user=${local.citemplate_storage}:${local.snippet_dir}/user-${local.snippet_file_base},network=${local.citemplate_storage}:${local.snippet_dir}/network-${local.snippet_file_base}"
-  cloudinit_cdrom_storage = var.pxe_boot == true ? null : var.cloudinit_cdrom_storage
 }
diff --git a/variables.tf b/variables.tf
index bccfd8e..5f5ea51 100644
--- a/variables.tf
+++ b/variables.tf
@@ -103,10 +103,10 @@ variable "onboot" {
   type        = bool
 }
 
-variable "oncreate" {
-  default     = null
-  description = "Whether to have the VM startup after the VM is created."
-  type        = bool
+variable "vm_state" {
+  default     = "running"
+  description = "Desired power state of the VM."
+  type        = string
 }
 
 variable "network_interfaces" {
@@ -120,13 +120,23 @@ variable "network_interfaces" {
 }
 
 variable "disks" {
-  default     = null
   description = "List of objects representing additional disks."
   type = list(object({
-    type    = string
-    storage = string
-    size    = string
+    slot       = string
+    size       = string
+    storage    = string
+    emulatessd = bool
+    iothread   = bool
+    discard    = bool
   }))
+  default = [{
+    slot       = "scsi0"
+    size       = "20G"
+    storage    = "local-lvm"
+    emulatessd = false
+    iothread   = false
+    discard    = false
+  }]
 }
 
 variable "os_type" {
@@ -140,9 +150,3 @@ variable "cicustom" {
   description = "Path(s) to cloud-init config files (ignored when pxe_boot is true)."
   type        = string
 }
-
-variable "cloudinit_cdrom_storage" {
-  default     = null
-  description = "Name of the storage to create the cloud-init image in (e.g. local-lvm)."
-  type        = string
-}
diff --git a/versions.tf b/versions.tf
index 54b7164..0511eb5 100644
--- a/versions.tf
+++ b/versions.tf
@@ -4,7 +4,7 @@ terraform {
   required_providers {
     proxmox = {
       source  = "Telmate/proxmox"
-      version = ">= 2.9.14"
+      version = ">= 3.0.1-rc4"
     }
   }
 }