diff --git a/README.md b/README.md
index 99926dc..2261ecf 100644
--- a/README.md
+++ b/README.md
@@ -447,7 +447,7 @@ for details and use-cases.
 
   The domain name that should be used. Can be set to a FQDN or prefix.
   If no FQDN and `certificate_arn` are set, the domain prefix will be used for the sign-up and sign-in pages that are hosted by Amazon Cognito,
-  e.g. `https://{YOUR_PREFIX}.auth.eu-west-1.amazoncognito.com`.
+  e.g. `https://{YOUR_PREFIX}.auth.us-west-1.amazoncognito.com`.
   The prefix must be unique across the selected AWS Region.
   Domain names can only contain lower-case letters, numbers, and hyphens.
 
diff --git a/README.tfdoc.hcl b/README.tfdoc.hcl
index 00737cc..a1719b7 100644
--- a/README.tfdoc.hcl
+++ b/README.tfdoc.hcl
@@ -580,7 +580,7 @@ section {
           description = <<-END
             The domain name that should be used. Can be set to a FQDN or prefix.
             If no FQDN and `certificate_arn` are set, the domain prefix will be used for the sign-up and sign-in pages that are hosted by Amazon Cognito,
-            e.g. `https://{YOUR_PREFIX}.auth.eu-west-1.amazoncognito.com`.
+            e.g. `https://{YOUR_PREFIX}.auth.us-west-1.amazoncognito.com`.
             The prefix must be unique across the selected AWS Region.
             Domain names can only contain lower-case letters, numbers, and hyphens.
           END
diff --git a/variables.tf b/variables.tf
index 30b0b1d..644e2c1 100644
--- a/variables.tf
+++ b/variables.tf
@@ -99,7 +99,7 @@ variable "clients" {
 }
 
 variable "domain" {
-  description = "(Optional) Type a domain prefix to use for the sign-up and sign-in pages that are hosted by Amazon Cognito, e.g. 'https://{YOUR_PREFIX}.auth.eu-west-1.amazoncognito.com'. The prefix must be unique across the selected AWS Region. Domain names can only contain lower-case letters, numbers, and hyphens."
+  description = "(Optional) Type a domain prefix to use for the sign-up and sign-in pages that are hosted by Amazon Cognito, e.g. 'https://{YOUR_PREFIX}.auth.us-west-1.amazoncognito.com'. The prefix must be unique across the selected AWS Region. Domain names can only contain lower-case letters, numbers, and hyphens."
   type        = string
   default     = null
 }