diff --git a/modules/organizations_member/variables.tf b/modules/organizations_member/variables.tf
index 061c9f2..8505876 100644
--- a/modules/organizations_member/variables.tf
+++ b/modules/organizations_member/variables.tf
@@ -4,12 +4,12 @@
 variable "member_config" {
   description = <<EOF
   Specifies the member account configuration:
-  `account_id`                 - The 13 digit ID number of the member account. Example: `123456789012`.
+  `account_id`                 - The 12 digit ID number of the member account. Example: `123456789012`.
   `email`                      - Email address to send the invite for member account. Defaults to `null`.
   `invite`                     - Whether to invite the account to SecurityHub as a member. Defaults to `false`. To detect if an invitation needs to be (re-)sent, the Terraform state value is true based on a `member_status` of `Disabled` | `Enabled` |  `Invited` |  EmailVerificationInProgress.
   EOF
   type = list(object({
-    account_id = number
+    account_id = string
     email      = string
     invite     = bool
   }))