diff --git a/terraform/aws-vpc/README.md b/terraform/aws-vpc/README.md
index 539d645..e05f44c 100644
--- a/terraform/aws-vpc/README.md
+++ b/terraform/aws-vpc/README.md
@@ -9,7 +9,7 @@ These config will create the following resources on AWS. The VPC CIDR is hard-co
 * 1 nat gateway
 
 ## Variables to TF
-These are required variables:
+These are required variables, which can be set in terraform.tfvars
 
 ```
 aws_access_key = "redacted"