diff --git a/test/terraform/gcp-temporary/main.tf b/test/terraform/gcp-temporary/main.tf
index d1b28d73807c5..00c0de13199a6 100644
--- a/test/terraform/gcp-temporary/main.tf
+++ b/test/terraform/gcp-temporary/main.tf
@@ -259,7 +259,7 @@ module "operator" {
 
 # 7. Deploy Materialize instance with configured backend connections
 module "materialize_instance" {
-  source = "git::https://github.com/MaterializeInc/materialize-terraform-self-managed.git//kubernetes/modules/materialize-instance?ref=v13.10.0"
+  source = "git::https://github.com/MaterializeInc/materialize-terraform-self-managed.git//kubernetes/modules/materialize-instance?ref=v13.12.1"
 
   instance_name        = local.materialize_instance_name
   instance_namespace   = local.materialize_instance_namespace