diff --git a/layers/000base/main.tf b/layers/000base/main.tf
index aaafbc7..91eafcc 100644
--- a/layers/000base/main.tf
+++ b/layers/000base/main.tf
@@ -13,7 +13,7 @@ vpc_basenetwork
 module "vpc_basenetwork" {
   source = "../../modules/vpc_basenetwork"
 
-  vpc_cidr             = "172.16.0.0/16"
+  vpc_cidr             = var.vpc_cidr
   subnet_public_range  = var.subnet_public_range
   subnet_private_range = var.subnet_private_range
   vpc_name             = var.vpc_name