diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7e21051f..34dfc580 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,7 +9,7 @@ project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Added
 
-- A tiny but mighty feature. (you're on fire, @me 🔥)
+- manage eks workers' root volume size and type
 
 ### Changed
 
diff --git a/README.md b/README.md
index 788c9062..b5859a85 100644
--- a/README.md
+++ b/README.md
@@ -90,6 +90,7 @@ Many thanks to [the contributors listed here](https://github.com/terraform-aws-m
 
 MIT Licensed. See [LICENSE](https://github.com/terraform-aws-modules/terraform-aws-eks/tree/master/LICENSE) for full details.
 
+
 ## Inputs
 
 | Name | Description | Type | Default | Required |
@@ -131,3 +132,4 @@ MIT Licensed. See [LICENSE](https://github.com/terraform-aws-modules/terraform-a
 | worker_iam_role_name | IAM role name attached to EKS workers |
 | worker_security_group_id | Security group ID attached to the EKS workers. |
 | workers_asg_arns | IDs of the autoscaling groups containing workers. |
+
diff --git a/variables.tf b/variables.tf
index 752fc13f..2de0ea90 100644
--- a/variables.tf
+++ b/variables.tf
@@ -85,6 +85,9 @@ variable "workers_group_defaults" {
     asg_max_size         = "3"           # Maximum worker capacity in the autoscaling group.
     asg_min_size         = "1"           # Minimum worker capacity in the autoscaling group.
     instance_type        = "m4.large"    # Size of the workers instances.
+    root_volume_size     = "20"          # root volume size of workers instances.
+    root_volume_type     = "gp2"         # root volume type of workers instances, can be 'standard', 'gp2', or 'io1'
+    root_iops            = "0"           # The amount of provisioned IOPS. This must be set with a volume_type of "io1".
     key_name             = ""            # The key name that should be used for the instances in the autoscaling group
     pre_userdata         = ""            # userdata to pre-append to the default userdata.
     additional_userdata  = ""            # userdata to append to the default userdata.
diff --git a/workers.tf b/workers.tf
index 1184de48..869ffa2d 100644
--- a/workers.tf
+++ b/workers.tf
@@ -37,6 +37,9 @@ resource "aws_launch_configuration" "workers" {
   }
 
   root_block_device {
+    volume_size           = "${lookup(var.worker_groups[count.index], "root_volume_size", lookup(var.workers_group_defaults, "root_volume_size"))}"
+    volume_type           = "${lookup(var.worker_groups[count.index], "root_volume_type", lookup(var.workers_group_defaults, "root_volume_type"))}"
+    iops                  = "${lookup(var.worker_groups[count.index], "root_iops", lookup(var.workers_group_defaults, "root_iops"))}"
     delete_on_termination = true
   }
 }