diff --git a/README.md b/README.md
index 4991870..9dbbe35 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,7 @@ Cloud CA demonstration built using AWS CA Terraform Module
 
 ## IMPORTANT
 If cloning this repository to use as a basis for your own CA, it's essential that you:
+* Update to the latest version of the CA
 * Delete the CSR files in the [csr directory](./certs/dev/csrs/)
 * Delete references to these files in [locals.tf](./locals.tf) and [tls.json](./certs/dev/tls.json)
 * Replace the contents of [revoked.json](./certs/dev/revoked.json) with an empty list `[]`
diff --git a/ca.tf b/ca.tf
index ccef501..7670a3b 100644
--- a/ca.tf
+++ b/ca.tf
@@ -1,6 +1,6 @@
 module "certificate_authority" {
   source  = "serverless-ca/ca/aws"
-  version = "1.3.1"
+  version = "1.4.0"
 
   hosted_zone_domain = var.hosted_zone_domain
   hosted_zone_id     = data.aws_route53_zone.public.zone_id