diff --git a/blueprints/networking/psc-glb-and-armor/variables.tf b/blueprints/networking/psc-glb-and-armor/variables.tf
index cf80d4d58..3a71e7c6e 100644
--- a/blueprints/networking/psc-glb-and-armor/variables.tf
+++ b/blueprints/networking/psc-glb-and-armor/variables.tf
@@ -31,18 +31,22 @@ variable "project_create" {
 
 variable "consumer_project_id" {
   description = "The consumer project, in which the GCLB and Cloud Armor should be created."
+  type        = string
 }
 
 variable "producer_project_id" {
   description = "The producer project, in which the ILB, PSC Service Attachment and Cloud Run service should be created"
+  type        = string
 }
 
 variable "region" {
-  default = "europe-west1"
   description = "The GCP region in which the resources should be deployed."
+  type        = string
+  default = "europe-west1"
 }
 
 variable "zone" {
-  default = "europe-west1-b"
   description = "The GCP zone for the VM."
+  type        = string
+  default = "europe-west1-b"
 }
\ No newline at end of file