diff --git a/variables.tf b/variables.tf
index 21e2737..459f0ce 100644
--- a/variables.tf
+++ b/variables.tf
@@ -1,26 +1,33 @@
 variable "instance_name" {
   description = "the name of the database instance to create"
   type        = string
+  sensitive   = true
 }
 
 variable "region" {
   description = "the GCP region to deploy the database to"
   type        = string
+  sensitive   = true
   default     = "europe-west1"
 }
 
 variable "database_tier" {
   description = "the database tier to use"
   type        = string
+  sensitive   = true
   default     = "db-f1-micro"
 }
 
 variable "database_name" {
   description = "the name of the database to create in the instance"
   type        = string
+  sensitive   = true
+  default     = "demo"
 }
 
 variable "database_user_name" {
   description = "the name of the database user to create"
   type        = string
+  sensitive   = true
+  default     = "administrator"
 }
\ No newline at end of file