diff --git a/vpc.tf b/vpc.tf
index a393e08..4dfbb7c 100644
--- a/vpc.tf
+++ b/vpc.tf
@@ -1,3 +1,7 @@
+locals {
+  availability_zones = ["${var.aws_region}a", "${var.aws_region}b"]
+}
+
 # VPC
 resource "aws_vpc" "vpc" {
   cidr_block           = "10.0.0.0/16"