diff --git a/.github/workflows/validate-codeowners.yml b/.github/workflows/validate-codeowners.yml
index 70f829e..4b4a226 100644
--- a/.github/workflows/validate-codeowners.yml
+++ b/.github/workflows/validate-codeowners.yml
@@ -10,6 +10,7 @@ jobs:
     steps:
     - name: "Checkout source code at current commit"
       uses: actions/checkout@v2
+      # Leave pinned at 0.7.1 until https://github.com/mszostok/codeowners-validator/issues/173 is resolved
     - uses: mszostok/codeowners-validator@v0.7.1
       if: github.event.pull_request.head.repo.full_name == github.repository
       name: "Full check of CODEOWNERS"
diff --git a/README.md b/README.md
index 68d0bc3..33b8f82 100644
--- a/README.md
+++ b/README.md
@@ -313,6 +313,7 @@ Available targets:
 | <a name="input_tenant"></a> [tenant](#input\_tenant) | ID element \_(Rarely used, not included by default)\_. A customer identifier, indicating who this instance of a resource is for | `string` | `null` | no |
 | <a name="input_transit_encryption_enabled"></a> [transit\_encryption\_enabled](#input\_transit\_encryption\_enabled) | Set `true` to enable encryption in transit. Forced `true` if `var.auth_token` is set.<br>If this is enabled, use the [following guide](https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/in-transit-encryption.html#connect-tls) to access redis. | `bool` | `true` | no |
 | <a name="input_use_existing_security_groups"></a> [use\_existing\_security\_groups](#input\_use\_existing\_security\_groups) | DEPRECATED: Use `create_security_group` instead.<br>Historical description: Flag to enable/disable creation of Security Group in the module.<br>Set to `true` to disable Security Group creation and provide a list of existing security Group IDs in `existing_security_groups` to place the cluster into.<br>Historical default: `false` | `bool` | `null` | no |
+| <a name="input_user_group_ids"></a> [user\_group\_ids](#input\_user\_group\_ids) | User Group ID to associate with the replication group | `list(string)` | `[]` | no |
 | <a name="input_vpc_id"></a> [vpc\_id](#input\_vpc\_id) | VPC ID | `string` | n/a | yes |
 | <a name="input_zone_id"></a> [zone\_id](#input\_zone\_id) | Route53 DNS Zone ID as list of string (0 or 1 items). If empty, no custom DNS name will be published.<br>If the list contains a single Zone ID, a custom DNS name will be pulished in that zone.<br>Can also be a plain string, but that use is DEPRECATED because of Terraform issues. | `any` | `[]` | no |
 
@@ -500,7 +501,7 @@ Check out [our other projects][github], [follow us on twitter][twitter], [apply
 
 [![README Footer][readme_footer_img]][readme_footer_link]
 [![Beacon][beacon]][website]
-
+<!-- markdownlint-disable -->
   [logo]: https://cloudposse.com/logo-300x69.svg
   [docs]: https://cpco.io/docs?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=docs
   [website]: https://cpco.io/homepage?utm_source=github&utm_medium=readme&utm_campaign=cloudposse/terraform-aws-elasticache-redis&utm_content=website
@@ -531,3 +532,4 @@ Check out [our other projects][github], [follow us on twitter][twitter], [apply
   [share_googleplus]: https://plus.google.com/share?url=https://github.com/cloudposse/terraform-aws-elasticache-redis
   [share_email]: mailto:?subject=terraform-aws-elasticache-redis&body=https://github.com/cloudposse/terraform-aws-elasticache-redis
   [beacon]: https://ga-beacon.cloudposse.com/UA-76589703-4/cloudposse/terraform-aws-elasticache-redis?pixel&cs=github&cm=readme&an=terraform-aws-elasticache-redis
+<!-- markdownlint-restore -->
diff --git a/docs/terraform.md b/docs/terraform.md
index 33f8394..dea7fd8 100644
--- a/docs/terraform.md
+++ b/docs/terraform.md
@@ -103,6 +103,7 @@
 | <a name="input_tenant"></a> [tenant](#input\_tenant) | ID element \_(Rarely used, not included by default)\_. A customer identifier, indicating who this instance of a resource is for | `string` | `null` | no |
 | <a name="input_transit_encryption_enabled"></a> [transit\_encryption\_enabled](#input\_transit\_encryption\_enabled) | Set `true` to enable encryption in transit. Forced `true` if `var.auth_token` is set.<br>If this is enabled, use the [following guide](https://docs.aws.amazon.com/AmazonElastiCache/latest/red-ug/in-transit-encryption.html#connect-tls) to access redis. | `bool` | `true` | no |
 | <a name="input_use_existing_security_groups"></a> [use\_existing\_security\_groups](#input\_use\_existing\_security\_groups) | DEPRECATED: Use `create_security_group` instead.<br>Historical description: Flag to enable/disable creation of Security Group in the module.<br>Set to `true` to disable Security Group creation and provide a list of existing security Group IDs in `existing_security_groups` to place the cluster into.<br>Historical default: `false` | `bool` | `null` | no |
+| <a name="input_user_group_ids"></a> [user\_group\_ids](#input\_user\_group\_ids) | User Group ID to associate with the replication group | `list(string)` | `[]` | no |
 | <a name="input_vpc_id"></a> [vpc\_id](#input\_vpc\_id) | VPC ID | `string` | n/a | yes |
 | <a name="input_zone_id"></a> [zone\_id](#input\_zone\_id) | Route53 DNS Zone ID as list of string (0 or 1 items). If empty, no custom DNS name will be published.<br>If the list contains a single Zone ID, a custom DNS name will be pulished in that zone.<br>Can also be a plain string, but that use is DEPRECATED because of Terraform issues. | `any` | `[]` | no |
 
diff --git a/main.tf b/main.tf
index 206132c..bff55db 100644
--- a/main.tf
+++ b/main.tf
@@ -158,6 +158,7 @@ resource "aws_elasticache_replication_group" "default" {
 
   num_node_groups         = var.cluster_mode_enabled ? var.cluster_mode_num_node_groups : null
   replicas_per_node_group = var.cluster_mode_enabled ? var.cluster_mode_replicas_per_node_group : null
+  user_group_ids          = var.user_group_ids
 }
 
 #
diff --git a/variables.tf b/variables.tf
index 4e105d3..73205a9 100644
--- a/variables.tf
+++ b/variables.tf
@@ -236,3 +236,9 @@ variable "description" {
   default     = null
   description = "Description of elasticache replication group"
 }
+
+variable "user_group_ids" {
+  type        = list(string)
+  default     = []
+  description = "User Group ID to associate with the replication group"
+}