diff --git a/terraform/README.md b/terraform/README.md
index f1ec7bf88..03a1e476c 100644
--- a/terraform/README.md
+++ b/terraform/README.md
@@ -140,7 +140,7 @@ If everything looks good, answer `yes` and wait for the new infrastructure to be
 
 | Name | Source | Version |
 |------|--------|---------|
-| <a name="module_azure_container_apps_hosting"></a> [azure\_container\_apps\_hosting](#module\_azure\_container\_apps\_hosting) | github.com/DFE-Digital/terraform-azurerm-container-apps-hosting | v1.4.7 |
+| <a name="module_azure_container_apps_hosting"></a> [azure\_container\_apps\_hosting](#module\_azure\_container\_apps\_hosting) | github.com/DFE-Digital/terraform-azurerm-container-apps-hosting | v1.4.9 |
 | <a name="module_azurerm_key_vault"></a> [azurerm\_key\_vault](#module\_azurerm\_key\_vault) | github.com/DFE-Digital/terraform-azurerm-key-vault-tfvars | v0.3.0 |
 | <a name="module_statuscake-tls-monitor"></a> [statuscake-tls-monitor](#module\_statuscake-tls-monitor) | github.com/dfe-digital/terraform-statuscake-tls-monitor | v0.1.2 |
 
@@ -176,6 +176,7 @@ If everything looks good, answer `yes` and wait for the new infrastructure to be
 | <a name="input_container_max_replicas"></a> [container\_max\_replicas](#input\_container\_max\_replicas) | Container max replicas | `number` | n/a | yes |
 | <a name="input_container_memory"></a> [container\_memory](#input\_container\_memory) | Container memory in GB | `number` | n/a | yes |
 | <a name="input_container_min_replicas"></a> [container\_min\_replicas](#input\_container\_min\_replicas) | Container min replicas | `number` | n/a | yes |
+| <a name="input_container_scale_http_concurrency"></a> [container\_scale\_http\_concurrency](#input\_container\_scale\_http\_concurrency) | When the number of concurrent HTTP requests exceeds this value, then another replica is added. Replicas continue to add to the pool up to the max-replicas amount. | `number` | `10` | no |
 | <a name="input_container_secret_environment_variables"></a> [container\_secret\_environment\_variables](#input\_container\_secret\_environment\_variables) | Container secret environment variables | `map(string)` | n/a | yes |
 | <a name="input_dns_ns_records"></a> [dns\_ns\_records](#input\_dns\_ns\_records) | DNS NS records to add to the DNS Zone | <pre>map(<br>    object({<br>      ttl : optional(number, 300),<br>      records : list(string)<br>    })<br>  )</pre> | n/a | yes |
 | <a name="input_dns_txt_records"></a> [dns\_txt\_records](#input\_dns\_txt\_records) | DNS TXT records to add to the DNS Zone | <pre>map(<br>    object({<br>      ttl : optional(number, 300),<br>      records : list(string)<br>    })<br>  )</pre> | n/a | yes |
diff --git a/terraform/container-apps-hosting.tf b/terraform/container-apps-hosting.tf
index e2c9c3fec..2f1ccccba 100644
--- a/terraform/container-apps-hosting.tf
+++ b/terraform/container-apps-hosting.tf
@@ -1,5 +1,5 @@
 module "azure_container_apps_hosting" {
-  source = "github.com/DFE-Digital/terraform-azurerm-container-apps-hosting?ref=v1.4.7"
+  source = "github.com/DFE-Digital/terraform-azurerm-container-apps-hosting?ref=v1.4.9"
 
   environment    = local.environment
   project_name   = local.project_name
@@ -28,6 +28,7 @@ module "azure_container_apps_hosting" {
   container_memory                       = local.container_memory
   container_min_replicas                 = local.container_min_replicas
   container_max_replicas                 = local.container_max_replicas
+  container_scale_http_concurrency       = local.container_scale_http_concurrency
 
   enable_redis_cache   = local.enable_redis_cache
   redis_cache_sku      = local.redis_cache_sku
diff --git a/terraform/locals.tf b/terraform/locals.tf
index cbd0f614a..8342fa988 100644
--- a/terraform/locals.tf
+++ b/terraform/locals.tf
@@ -16,6 +16,7 @@ locals {
   container_memory                             = var.container_memory
   container_min_replicas                       = var.container_min_replicas
   container_max_replicas                       = var.container_max_replicas
+  container_scale_http_concurrency             = var.container_scale_http_concurrency
   enable_redis_cache                           = var.enable_redis_cache
   enable_mssql_database                        = var.enable_mssql_database
   mssql_server_admin_password                  = var.mssql_server_admin_password
diff --git a/terraform/variables.tf b/terraform/variables.tf
index af5430c69..2e8c9ef3a 100644
--- a/terraform/variables.tf
+++ b/terraform/variables.tf
@@ -62,6 +62,12 @@ variable "container_secret_environment_variables" {
   sensitive   = true
 }
 
+variable "container_scale_http_concurrency" {
+  description = "When the number of concurrent HTTP requests exceeds this value, then another replica is added. Replicas continue to add to the pool up to the max-replicas amount."
+  type        = number
+  default     = 10
+}
+
 variable "enable_redis_cache" {
   description = "Set to true to create a Redis Cache"
   type        = bool