diff --git a/proxmox/terraform/versions.tf b/proxmox/terraform/versions.tf
index 845ecae..a501528 100644
--- a/proxmox/terraform/versions.tf
+++ b/proxmox/terraform/versions.tf
@@ -1,29 +1,28 @@
 terraform {
   required_version = ">= 0.13"
-  experiments      = [module_variable_optional_attrs]
   required_providers {
     proxmox = {
       source = "telmate/proxmox"
       version = "2.9.10"
     }
     rancher2 = {
       source = "rancher/rancher2"
       version = "1.24.0"
     }
   }
 }
 
 provider "proxmox" {
   pm_tls_insecure = true
   pm_api_url      = "https://beaubourg.internal.softwareheritage.org:8006/api2/json"
   # in a shell (see README): source ../setup.sh
 
   # Uncomment this section to activate the proxmox execution logs
   # pm_log_enable = true
   # pm_log_file = "terraform-plugin-proxmox.log"
   # pm_debug = true
   # pm_log_levels = {
   #   _default = "debug"
   #   _capturelog = ""
   # }
 }