diff --git a/vpn-transit-gateway/main.tf b/vpn-transit-gateway/main.tf
index 5e63a0c..ad08541 100644
--- a/vpn-transit-gateway/main.tf
+++ b/vpn-transit-gateway/main.tf
@@ -147,7 +147,8 @@ resource "aws_vpn_connection" "vpn" {
 }
 
 # attachments are implicity.  Use aws_ec2_tag to set the tags
-#   see https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/ec2_transit_gateway_vpn_attachment
+#   https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/ec2_transit_gateway_vpn_attachment
+#   https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/ec2_tag
 
 resource "aws_ec2_tag" "vpn_tag_created_by" {
   for_each    = var.create ? local.vpn_settings : {}