diff --git a/main.tf b/main.tf
index 64589ff..2e94930 100644
--- a/main.tf
+++ b/main.tf
@@ -51,7 +51,7 @@ resource "aws_route_table" "private" {
 }
 
 resource "aws_route" "private" {
-  count = length(var.private_subnet_cidr_blocks)
+  count = length(var.public_subnet_cidr_blocks) > 0 ? length(var.private_subnet_cidr_blocks) : 0
 
   route_table_id         = aws_route_table.private[count.index].id
   destination_cidr_block = "0.0.0.0/0"
@@ -81,8 +81,8 @@ resource "aws_subnet" "private" {
 
   vpc_id                                         = aws_vpc.default.id
   cidr_block                                     = var.private_subnet_cidr_blocks[count.index]
-  enable_dns64                                   = true
-  enable_resource_name_dns_aaaa_record_on_launch = true
+  enable_dns64                                   = false
+  enable_resource_name_dns_aaaa_record_on_launch = false
   enable_resource_name_dns_a_record_on_launch    = true
   availability_zone                              = var.availability_zones[count.index]
   private_dns_hostname_type_on_launch            = "resource-name"
@@ -100,8 +100,8 @@ resource "aws_subnet" "public" {
 
   vpc_id                                         = aws_vpc.default.id
   cidr_block                                     = var.public_subnet_cidr_blocks[count.index]
-  enable_dns64                                   = true
-  enable_resource_name_dns_aaaa_record_on_launch = true
+  enable_dns64                                   = false
+  enable_resource_name_dns_aaaa_record_on_launch = false
   enable_resource_name_dns_a_record_on_launch    = true
   availability_zone                              = var.availability_zones[count.index]
   map_public_ip_on_launch                        = true