diff --git a/README.md b/README.md
index 0b52b21..202ebc1 100644
--- a/README.md
+++ b/README.md
@@ -158,7 +158,7 @@ No modules.
 | <a name="input_validate_certificate"></a> [validate\_certificate](#input\_validate\_certificate) | Whether to validate certificate by creating Route53 record | `bool` | `true` | no |
 | <a name="input_validation_allow_overwrite_records"></a> [validation\_allow\_overwrite\_records](#input\_validation\_allow\_overwrite\_records) | Whether to allow overwrite of Route53 records | `bool` | `true` | no |
 | <a name="input_validation_method"></a> [validation\_method](#input\_validation\_method) | Which method to use for validation. DNS or EMAIL are valid, NONE can be used for certificates that were imported into ACM and then into Terraform. | `string` | `"DNS"` | no |
-| <a name="input_validation_option"></a> [validation\_option](#input\_validation\_option) | The domain name that you want ACM to use to send you validation emails. This domain name is the suffix of the email addresses that you want ACM to use. | `map(string)` | `{}` | no |
+| <a name="input_validation_option"></a> [validation\_option](#input\_validation\_option) | The domain name that you want ACM to use to send you validation emails. This domain name is the suffix of the email addresses that you want ACM to use. | `any` | `{}` | no |
 | <a name="input_validation_record_fqdns"></a> [validation\_record\_fqdns](#input\_validation\_record\_fqdns) | When validation is set to DNS and the DNS validation records are set externally, provide the fqdns for the validation | `list(string)` | `[]` | no |
 | <a name="input_wait_for_validation"></a> [wait\_for\_validation](#input\_wait\_for\_validation) | Whether to wait for the validation to complete | `bool` | `true` | no |
 | <a name="input_zone_id"></a> [zone\_id](#input\_zone\_id) | The ID of the hosted zone to contain this record. Required when validating via Route53 | `string` | `""` | no |
diff --git a/variables.tf b/variables.tf
index c7a6ae7..681fbaf 100644
--- a/variables.tf
+++ b/variables.tf
@@ -53,7 +53,7 @@ variable "validation_method" {
 
 variable "validation_option" {
   description = "The domain name that you want ACM to use to send you validation emails. This domain name is the suffix of the email addresses that you want ACM to use."
-  type        = map(string)
+  type        = any
   default     = {}
 }