diff --git a/main.tf b/main.tf
index ac4705f0759e14362c5ada0e898d951c196b9db6..2133736b3561db8853f7df629ecfe5b8aaa6b255 100644
--- a/main.tf
+++ b/main.tf
@@ -55,7 +55,7 @@ output "keypair_name" {
 }
 
 data "openstack_networking_network_v2" "external_net" {name = var.external_network}
-data "openstack_blockstorage_volume_v2" "disk" {name = var.data_volume}
+data "openstack_blockstorage_volume_v3" "disk" {name = var.data_volume}
 
 # runs the ohpc-instance module - creates ohpc instance using variables defined above
 # calls functions from dmz-network, import-keypair, and floating-ip-address modules to get values created there for use