diff --git a/README.md b/README.md
index c749444..122b8b5 100644
--- a/README.md
+++ b/README.md
@@ -220,6 +220,7 @@ Available targets:
 | <a name="input_max_item_size"></a> [max\_item\_size](#input\_max\_item\_size) | Max item size | `number` | `10485760` | no |
 | <a name="input_name"></a> [name](#input\_name) | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.<br/>This is the only ID element not also included as a `tag`.<br/>The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input. | `string` | `null` | no |
 | <a name="input_namespace"></a> [namespace](#input\_namespace) | ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique | `string` | `null` | no |
+| <a name="input_network_type"></a> [network\_type](#input\_network\_type) | The network type of the cluster. Valid values: ipv4, ipv6, dual\_stack. | `string` | `"ipv4"` | no |
 | <a name="input_notification_topic_arn"></a> [notification\_topic\_arn](#input\_notification\_topic\_arn) | Notification topic arn | `string` | `""` | no |
 | <a name="input_port"></a> [port](#input\_port) | Memcached port | `number` | `11211` | no |
 | <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.<br/>Characters matching the regex will be removed from the ID elements.<br/>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
diff --git a/docs/terraform.md b/docs/terraform.md
index e63d993..3ebb37e 100644
--- a/docs/terraform.md
+++ b/docs/terraform.md
@@ -77,6 +77,7 @@
 | <a name="input_max_item_size"></a> [max\_item\_size](#input\_max\_item\_size) | Max item size | `number` | `10485760` | no |
 | <a name="input_name"></a> [name](#input\_name) | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.<br>This is the only ID element not also included as a `tag`.<br>The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input. | `string` | `null` | no |
 | <a name="input_namespace"></a> [namespace](#input\_namespace) | ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique | `string` | `null` | no |
+| <a name="input_network_type"></a> [network\_type](#input\_network\_type) | The network type of the cluster. Valid values: ipv4, ipv6, dual\_stack. | `string` | `"ipv4"` | no |
 | <a name="input_notification_topic_arn"></a> [notification\_topic\_arn](#input\_notification\_topic\_arn) | Notification topic arn | `string` | `""` | no |
 | <a name="input_port"></a> [port](#input\_port) | Memcached port | `number` | `11211` | no |
 | <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.<br>Characters matching the regex will be removed from the ID elements.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
diff --git a/main.tf b/main.tf
index f45c60b..adb1a9e 100644
--- a/main.tf
+++ b/main.tf
@@ -121,6 +121,7 @@ resource "aws_elasticache_cluster" "default" {
   az_mode                      = var.az_mode
   availability_zone            = var.availability_zone
   preferred_availability_zones = var.availability_zones
+  network_type                 = var.network_type
   tags                         = module.this.tags
 }
 
diff --git a/variables.tf b/variables.tf
index 105193d..c426d7f 100644
--- a/variables.tf
+++ b/variables.tf
@@ -16,6 +16,12 @@ variable "subnets" {
   description = "AWS subnet ids"
 }
 
+variable "network_type" {
+  type        = string
+  default     = "ipv4"
+  description = "The network type of the cluster. Valid values: ipv4, ipv6, dual_stack."
+}
+
 variable "maintenance_window" {
   type        = string
   default     = "wed:03:00-wed:04:00"