diff --git a/VERSION b/VERSION
index 877a4251f..cb0c132ee 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.1.2-${yyyy}${mm}${dd}.${HH}${MM}${SS}+${hash}
+1.1.3-${yyyy}${mm}${dd}.${HH}${MM}${SS}+${hash}
diff --git a/infrastructure/terraform/components/api/README.md b/infrastructure/terraform/components/api/README.md
index 0f72aaf22..30fa1991f 100644
--- a/infrastructure/terraform/components/api/README.md
+++ b/infrastructure/terraform/components/api/README.md
@@ -26,6 +26,7 @@ No requirements.
 | <a name="input_force_lambda_code_deploy"></a> [force\_lambda\_code\_deploy](#input\_force\_lambda\_code\_deploy) | If the lambda package in s3 has the same commit id tag as the terraform build branch, the lambda will not update automatically. Set to True if making changes to Lambda code from on the same commit for example during development | `bool` | `false` | no |
 | <a name="input_group"></a> [group](#input\_group) | The group variables are being inherited from (often synonmous with account short-name) | `string` | n/a | yes |
 | <a name="input_kms_deletion_window"></a> [kms\_deletion\_window](#input\_kms\_deletion\_window) | When a kms key is deleted, how long should it wait in the pending deletion state? | `string` | `"30"` | no |
+| <a name="input_letter_event_source"></a> [letter\_event\_source](#input\_letter\_event\_source) | Source value to use for the letter status event updates | `string` | `"/data-plane/supplier-api/nhs-supplier-api-prod/main/update-status"` | no |
 | <a name="input_letter_table_ttl_hours"></a> [letter\_table\_ttl\_hours](#input\_letter\_table\_ttl\_hours) | Number of hours to set as TTL on letters table | `number` | `24` | no |
 | <a name="input_letter_variant_map"></a> [letter\_variant\_map](#input\_letter\_variant\_map) | n/a | `map(object({ supplierId = string, specId = string }))` | <pre>{<br/>  "lv1": {<br/>    "specId": "spec1",<br/>    "supplierId": "supplier1"<br/>  },<br/>  "lv2": {<br/>    "specId": "spec2",<br/>    "supplierId": "supplier1"<br/>  },<br/>  "lv3": {<br/>    "specId": "spec3",<br/>    "supplierId": "supplier2"<br/>  }<br/>}</pre> | no |
 | <a name="input_log_level"></a> [log\_level](#input\_log\_level) | The log level to be used in lambda functions within the component. Any log with a lower severity than the configured value will not be logged: https://docs.python.org/3/library/logging.html#levels | `string` | `"INFO"` | no |
diff --git a/infrastructure/terraform/components/api/module_lambda_letter_updates_transformer.tf b/infrastructure/terraform/components/api/module_lambda_letter_updates_transformer.tf
index 52a444ec4..8699f4fe2 100644
--- a/infrastructure/terraform/components/api/module_lambda_letter_updates_transformer.tf
+++ b/infrastructure/terraform/components/api/module_lambda_letter_updates_transformer.tf
@@ -36,7 +36,7 @@ module "letter_updates_transformer" {
 
   lambda_env_vars = merge(local.common_lambda_env_vars, {
     EVENTPUB_SNS_TOPIC_ARN = "${module.eventpub.sns_topic.arn}",
-    EVENT_SOURCE = "/data-plane/supplier-api/${var.group}/${var.environment}/letters"
+    EVENT_SOURCE = var.letter_event_source
   })
 }
 
diff --git a/infrastructure/terraform/components/api/variables.tf b/infrastructure/terraform/components/api/variables.tf
index 9785ec00b..2975b2c07 100644
--- a/infrastructure/terraform/components/api/variables.tf
+++ b/infrastructure/terraform/components/api/variables.tf
@@ -181,3 +181,9 @@ variable "sns_success_logging_sample_percent" {
   description = "Enable SNS Delivery Successful Sample Percentage"
   default     = 0
 }
+
+variable "letter_event_source" {
+  type        = string
+  description = "Source value to use for the letter status event updates"
+  default     = "/data-plane/supplier-api/nhs-supplier-api-prod/main/update-status"
+}