diff --git a/README.md b/README.md
index fe91f13..79c5ed9 100644
--- a/README.md
+++ b/README.md
@@ -268,6 +268,7 @@ Available targets:
 | <a name="input_cluster_size"></a> [cluster\_size](#input\_cluster\_size) | Number of nodes in cluster. *Ignored when `cluster_mode_enabled` == `true`* | `number` | `1` | no |
 | <a name="input_context"></a> [context](#input\_context) | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br>  "additional_tag_map": {},<br>  "attributes": [],<br>  "delimiter": null,<br>  "descriptor_formats": {},<br>  "enabled": true,<br>  "environment": null,<br>  "id_length_limit": null,<br>  "label_key_case": null,<br>  "label_order": [],<br>  "label_value_case": null,<br>  "labels_as_tags": [<br>    "unset"<br>  ],<br>  "name": null,<br>  "namespace": null,<br>  "regex_replace_chars": null,<br>  "stage": null,<br>  "tags": {},<br>  "tenant": null<br>}</pre> | no |
 | <a name="input_create_security_group"></a> [create\_security\_group](#input\_create\_security\_group) | Set `true` to create and configure a new security group. If false, `associated_security_group_ids` must be provided. | `bool` | `true` | no |
+| <a name="input_data_tiering_enabled"></a> [data\_tiering\_enabled](#input\_data\_tiering\_enabled) | Enables data tiering. Data tiering is only supported for replication groups using the r6gd node type. | `bool` | `false` | no |
 | <a name="input_delimiter"></a> [delimiter](#input\_delimiter) | Delimiter to be used between ID elements.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
 | <a name="input_description"></a> [description](#input\_description) | Description of elasticache replication group | `string` | `null` | no |
 | <a name="input_descriptor_formats"></a> [descriptor\_formats](#input\_descriptor\_formats) | Describe additional descriptors to be output in the `descriptors` output map.<br>Map of maps. Keys are names of descriptors. Values are maps of the form<br>`{<br>   format = string<br>   labels = list(string)<br>}`<br>(Type is `any` so the map values can later be enhanced to provide additional options.)<br>`format` is a Terraform format string to be passed to the `format()` function.<br>`labels` is a list of labels, in order, to pass to `format()` function.<br>Label values will be normalized before being passed to `format()` so they will be<br>identical to how they appear in `id`.<br>Default is `{}` (`descriptors` output will be empty). | `any` | `{}` | no |
diff --git a/docs/terraform.md b/docs/terraform.md
index 8f489ca..b34f8dd 100644
--- a/docs/terraform.md
+++ b/docs/terraform.md
@@ -58,6 +58,7 @@
 | <a name="input_cluster_size"></a> [cluster\_size](#input\_cluster\_size) | Number of nodes in cluster. *Ignored when `cluster_mode_enabled` == `true`* | `number` | `1` | no |
 | <a name="input_context"></a> [context](#input\_context) | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br>  "additional_tag_map": {},<br>  "attributes": [],<br>  "delimiter": null,<br>  "descriptor_formats": {},<br>  "enabled": true,<br>  "environment": null,<br>  "id_length_limit": null,<br>  "label_key_case": null,<br>  "label_order": [],<br>  "label_value_case": null,<br>  "labels_as_tags": [<br>    "unset"<br>  ],<br>  "name": null,<br>  "namespace": null,<br>  "regex_replace_chars": null,<br>  "stage": null,<br>  "tags": {},<br>  "tenant": null<br>}</pre> | no |
 | <a name="input_create_security_group"></a> [create\_security\_group](#input\_create\_security\_group) | Set `true` to create and configure a new security group. If false, `associated_security_group_ids` must be provided. | `bool` | `true` | no |
+| <a name="input_data_tiering_enabled"></a> [data\_tiering\_enabled](#input\_data\_tiering\_enabled) | Enables data tiering. Data tiering is only supported for replication groups using the r6gd node type. | `bool` | `false` | no |
 | <a name="input_delimiter"></a> [delimiter](#input\_delimiter) | Delimiter to be used between ID elements.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
 | <a name="input_description"></a> [description](#input\_description) | Description of elasticache replication group | `string` | `null` | no |
 | <a name="input_descriptor_formats"></a> [descriptor\_formats](#input\_descriptor\_formats) | Describe additional descriptors to be output in the `descriptors` output map.<br>Map of maps. Keys are names of descriptors. Values are maps of the form<br>`{<br>   format = string<br>   labels = list(string)<br>}`<br>(Type is `any` so the map values can later be enhanced to provide additional options.)<br>`format` is a Terraform format string to be passed to the `format()` function.<br>`labels` is a list of labels, in order, to pass to `format()` function.<br>Label values will be normalized before being passed to `format()` so they will be<br>identical to how they appear in `id`.<br>Default is `{}` (`descriptors` output will be empty). | `any` | `{}` | no |
diff --git a/main.tf b/main.tf
index fe8dd88..eddfdcc 100644
--- a/main.tf
+++ b/main.tf
@@ -142,6 +142,7 @@ resource "aws_elasticache_replication_group" "default" {
   snapshot_retention_limit   = var.snapshot_retention_limit
   final_snapshot_identifier  = var.final_snapshot_identifier
   apply_immediately          = var.apply_immediately
+  data_tiering_enabled       = var.data_tiering_enabled
   auto_minor_version_upgrade = var.auto_minor_version_upgrade
 
   dynamic "log_delivery_configuration" {
diff --git a/variables.tf b/variables.tf
index 4d7480c..40b0c9c 100644
--- a/variables.tf
+++ b/variables.tf
@@ -112,6 +112,12 @@ variable "apply_immediately" {
   description = "Apply changes immediately"
 }
 
+variable "data_tiering_enabled" {
+  type        = bool
+  default     = false
+  description = "Enables data tiering. Data tiering is only supported for replication groups using the r6gd node type."
+}
+
 variable "automatic_failover_enabled" {
   type        = bool
   default     = false