diff --git a/README.md b/README.md
index 9573002..5573e0e 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,7 @@ See [this example](example/rds.tf)
 | cluster_name | The name of the cluster (eg.: cloud-platform-live-0) | string |  | yes |
 | cluster_state_bucket | The name of the S3 bucket holding the terraform state for the cluster | string | | yes |
 | db_allocated_storage | The allocated storage in gibibytes | string | `10` | no |
+| db_max_allocated_storage | Total storage in gibibytes up to which this RDS will autoscale | string | `10000` | no |
 | db_engine | Database engine used | string | `postgres` | no |
 | db_engine_version | The engine version to use | string | `10.4` | no |
 | db_instance_class | The instance type of the RDS instance | string | `db.t2.small` | no |
diff --git a/example/rds.tf b/example/rds.tf
index 9489fd1..aa610b7 100644
--- a/example/rds.tf
+++ b/example/rds.tf
@@ -21,7 +21,7 @@ variable "cluster_state_bucket" {
 # Make sure you restart your pods which use this RDS secret to avoid any down time.
 
 module "example_team_rds" {
-  source               = "github.com/ministryofjustice/cloud-platform-terraform-rds-instance?ref=5.11"
+  source               = "github.com/ministryofjustice/cloud-platform-terraform-rds-instance?ref=5.12"
   cluster_name         = var.cluster_name
   cluster_state_bucket = var.cluster_state_bucket
   team_name            = "example-repo"
diff --git a/main.tf b/main.tf
index 1cf5214..fe70e3a 100644
--- a/main.tf
+++ b/main.tf
@@ -96,6 +96,7 @@ resource "aws_db_instance" "rds" {
   identifier                   = var.rds_name != "" ? var.rds_name : local.identifier
   final_snapshot_identifier    = var.replicate_source_db != "" ? null : "${local.identifier}-finalsnapshot"
   allocated_storage            = var.db_allocated_storage
+  max_allocated_storage        = var.db_max_allocated_storage
   apply_immediately            = true
   engine                       = var.db_engine
   engine_version               = var.db_engine_version
diff --git a/template/rds.tmpl b/template/rds.tmpl
index 0f05051..cc9f61e 100644
--- a/template/rds.tmpl
+++ b/template/rds.tmpl
@@ -1,6 +1,6 @@
 
 module "rds" {
-  source               = "github.com/ministryofjustice/cloud-platform-terraform-rds-instance?ref=5.9"
+  source               = "github.com/ministryofjustice/cloud-platform-terraform-rds-instance?ref=5.12"
   cluster_name         = var.cluster_name
   cluster_state_bucket = var.cluster_state_bucket
   team_name            = var.team_name
diff --git a/variables.tf b/variables.tf
index 862b37e..caa20e2 100644
--- a/variables.tf
+++ b/variables.tf
@@ -44,6 +44,11 @@ variable "db_allocated_storage" {
   default     = "10"
 }
 
+variable "db_max_allocated_storage" {
+  description = "Maximum storage limit for storage autoscaling"
+  default     = "10000"
+}
+
 variable "db_engine" {
   description = "Database engine used e.g. postgres, mqsql"
   default     = "postgres"