diff --git a/README.md b/README.md
index 94a1ec2..1ff34de 100644
--- a/README.md
+++ b/README.md
@@ -238,6 +238,7 @@ Available targets:
 | <a name="input_log_publishing_index_enabled"></a> [log\_publishing\_index\_enabled](#input\_log\_publishing\_index\_enabled) | Specifies whether log publishing option for INDEX\_SLOW\_LOGS is enabled or not | `bool` | `false` | no |
 | <a name="input_log_publishing_search_cloudwatch_log_group_arn"></a> [log\_publishing\_search\_cloudwatch\_log\_group\_arn](#input\_log\_publishing\_search\_cloudwatch\_log\_group\_arn) | ARN of the CloudWatch log group to which log for SEARCH\_SLOW\_LOGS needs to be published | `string` | `""` | no |
 | <a name="input_log_publishing_search_enabled"></a> [log\_publishing\_search\_enabled](#input\_log\_publishing\_search\_enabled) | Specifies whether log publishing option for SEARCH\_SLOW\_LOGS is enabled or not | `bool` | `false` | no |
+| <a name="multi_az_with_standby_enabled"></a> [multi\_az\_with\_standby\_enabled](#multi\_az\_with\_standby\_enabled) | Enable domain with standby for OpenSearch cluster | `bool` | `false` | 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_node_to_node_encryption_enabled"></a> [node\_to\_node\_encryption\_enabled](#input\_node\_to\_node\_encryption\_enabled) | Whether to enable node-to-node encryption | `bool` | `false` | no |
diff --git a/docs/terraform.md b/docs/terraform.md
index 57ea59c..60da38f 100644
--- a/docs/terraform.md
+++ b/docs/terraform.md
@@ -113,6 +113,7 @@
 | <a name="input_log_publishing_index_enabled"></a> [log\_publishing\_index\_enabled](#input\_log\_publishing\_index\_enabled) | Specifies whether log publishing option for INDEX\_SLOW\_LOGS is enabled or not | `bool` | `false` | no |
 | <a name="input_log_publishing_search_cloudwatch_log_group_arn"></a> [log\_publishing\_search\_cloudwatch\_log\_group\_arn](#input\_log\_publishing\_search\_cloudwatch\_log\_group\_arn) | ARN of the CloudWatch log group to which log for SEARCH\_SLOW\_LOGS needs to be published | `string` | `""` | no |
 | <a name="input_log_publishing_search_enabled"></a> [log\_publishing\_search\_enabled](#input\_log\_publishing\_search\_enabled) | Specifies whether log publishing option for SEARCH\_SLOW\_LOGS is enabled or not | `bool` | `false` | no |
+| <a name="multi_az_with_standby_enabled"></a> [multi\_az\_with\_standby\_enabled](#multi\_az\_with\_standby\_enabled) | Enable domain with standby for OpenSearch cluster | `bool` | `false` | 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_node_to_node_encryption_enabled"></a> [node\_to\_node\_encryption\_enabled](#input\_node\_to\_node\_encryption\_enabled) | Whether to enable node-to-node encryption | `bool` | `false` | no |
diff --git a/opensearch_domain.tf b/opensearch_domain.tf
index ec4daa7..15cdcdd 100644
--- a/opensearch_domain.tf
+++ b/opensearch_domain.tf
@@ -46,15 +46,16 @@ resource "aws_opensearch_domain" "default" {
   }
 
   cluster_config {
-    instance_count           = var.instance_count
-    instance_type            = var.instance_type
-    dedicated_master_enabled = var.dedicated_master_enabled
-    dedicated_master_count   = var.dedicated_master_count
-    dedicated_master_type    = var.dedicated_master_type
-    zone_awareness_enabled   = var.zone_awareness_enabled
-    warm_enabled             = var.warm_enabled
-    warm_count               = var.warm_enabled ? var.warm_count : null
-    warm_type                = var.warm_enabled ? var.warm_type : null
+    instance_count                = var.instance_count
+    instance_type                 = var.instance_type
+    dedicated_master_enabled      = var.dedicated_master_enabled
+    dedicated_master_count        = var.dedicated_master_count
+    dedicated_master_type         = var.dedicated_master_type
+    multi_az_with_standby_enabled = var.multi_az_with_standby_enabled
+    zone_awareness_enabled        = var.zone_awareness_enabled
+    warm_enabled                  = var.warm_enabled
+    warm_count                    = var.warm_enabled ? var.warm_count : null
+    warm_type                     = var.warm_enabled ? var.warm_type : null
 
     dynamic "zone_awareness_config" {
       for_each = var.availability_zone_count > 1 && var.zone_awareness_enabled ? [true] : []
diff --git a/variables.tf b/variables.tf
index 805bf70..7b0d0b5 100644
--- a/variables.tf
+++ b/variables.tf
@@ -141,6 +141,12 @@ variable "availability_zone_count" {
   }
 }
 
+variable "multi_az_with_standby_enabled" {
+  type        = bool
+  default     = false  
+  description = "Enable domain with standby for OpenSearch cluster"
+}
+
 variable "ebs_volume_size" {
   type        = number
   description = "EBS volumes for data storage in GB"
diff --git a/versions.tf b/versions.tf
index 184c5eb..191ea63 100644
--- a/versions.tf
+++ b/versions.tf
@@ -4,7 +4,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = ">= 3.35.0"
+      version = ">= 5.15.0"
     }
   }
 }