diff --git a/README.md b/README.md
index b6c38d2..843d95a 100644
--- a/README.md
+++ b/README.md
@@ -114,6 +114,52 @@ resource "aws_rds_cluster_parameter_group" "aurora_57_cluster_parameter_group" {
   description = "test-aurora-57-cluster-parameter-group"
 }
 ```
+### Aurora 2.x (MySQL 5.7) (I/O Optimised)
+
+```hcl
+resource "aws_sns_topic" "db_alarms" {
+  name = "aurora-db-alarms"
+}
+
+module "aurora_db_57" {
+  source                          = "claranet/aurora/aws"
+  engine                          = "aurora-mysql"
+  engine-version                  = "5.7.12"
+  name                            = "test-aurora-db-57"
+  envname                         = "test-57"
+  envtype                         = "test"
+  subnets                         = ["${module.vpc.private_subnets}"]
+  azs                             = ["${module.vpc.availability_zones}"]
+  replica_count                   = "1"
+  security_groups                 = ["${aws_security_group.allow_all.id}"]
+  instance_type                   = "db.t2.medium"
+  username                        = "root"
+  password                        = "changeme"
+  backup_retention_period         = "5"
+  final_snapshot_identifier       = "final-db-snapshot-prod"
+  storage_encrypted               = "true"
+  storage_type                    = "aurora-iopt1"
+  apply_immediately               = "true"
+  monitoring_interval             = "10"
+  cw_alarms                       = true
+  cw_sns_topic                    = "${aws_sns_topic.db_alarms.id}"
+  db_parameter_group_name         = "${aws_db_parameter_group.aurora_db_57_parameter_group.id}"
+  db_cluster_parameter_group_name = "${aws_rds_cluster_parameter_group.aurora_57_cluster_parameter_group.id}"
+}
+
+resource "aws_db_parameter_group" "aurora_db_57_parameter_group" {
+  name        = "test-aurora-db-57-parameter-group"
+  family      = "aurora-mysql5.7"
+  description = "test-aurora-db-57-parameter-group"
+}
+
+resource "aws_rds_cluster_parameter_group" "aurora_57_cluster_parameter_group" {
+  name        = "test-aurora-57-cluster-parameter-group"
+  family      = "aurora-mysql5.7"
+  description = "test-aurora-57-cluster-parameter-group"
+}
+```
+
 ### Aurora PostgreSQL
 
 ```hcl
@@ -203,6 +249,7 @@ resource "aws_rds_cluster_parameter_group" "aurora_cluster_postgres96_parameter_
 | skip_final_snapshot | Should a final snapshot be created on cluster destroy | string | `false` | no |
 | snapshot_identifier | DB snapshot to create this database from | string | `""` | no |
 | storage_encrypted | Specifies whether the underlying storage layer should be encrypted | string | `true` | no |
+| storage_type | Specifies the storage type to be associated with the DB cluster (use aurora-iopt1 for I/O Optimized) | string | `""` | no |
 | subnets | List of subnet IDs to use | list | - | yes |
 | username | Master DB username | string | `root` | no |
 
diff --git a/main.tf b/main.tf
index eb40537..4a0f686 100644
--- a/main.tf
+++ b/main.tf
@@ -241,6 +241,7 @@ resource "aws_rds_cluster" "default" {
   vpc_security_group_ids          = var.security_groups
   snapshot_identifier             = var.snapshot_identifier
   storage_encrypted               = var.storage_encrypted
+  storage_type                    = var.storage_type
   apply_immediately               = var.apply_immediately
   db_cluster_parameter_group_name = var.db_cluster_parameter_group_name
   deletion_protection             = var.deletion_protection
diff --git a/variables.tf b/variables.tf
index 9018b8d..a0b0358 100644
--- a/variables.tf
+++ b/variables.tf
@@ -152,6 +152,12 @@ variable "storage_encrypted" {
   description = "Specifies whether the underlying storage layer should be encrypted"
 }
 
+variable "storage_type" {
+  type        = string
+  default     = ""
+  description = "Specifies the storage type to be associated with the DB cluster"
+}
+
 variable "cw_alarms" {
   type        = string
   default     = false