diff --git a/modules/compute/variables.tf b/modules/compute/variables.tf
index dc3c944..e12b2b7 100644
--- a/modules/compute/variables.tf
+++ b/modules/compute/variables.tf
@@ -13,16 +13,19 @@ variable "zone" {
 variable "frontend_cidr" {
   description = "range_front"
   type        = string
+  default     = "10.0.1.0/24"
 }
 
 variable "backend_cidr" {
   description = "range_back"
   type        = string
+  default     = "10.0.2.0/24"
 }
 
 variable "database_cidr" {
   description = "range_database"
   type        = string
+  default     = "10.0.3.0/24"
 }