diff --git a/terraform/environments/cdpt-chaps/application_variables.json b/terraform/environments/cdpt-chaps/application_variables.json
index 50c5dfbb969..c298975c4fb 100644
--- a/terraform/environments/cdpt-chaps/application_variables.json
+++ b/terraform/environments/cdpt-chaps/application_variables.json
@@ -8,7 +8,7 @@
       "env_name": "DEVELOPMENT",
       "db_instance_identifier": "db-chaps-dev",
       "db_snapshot_identifier": "arn:aws:rds:eu-west-2:613903586696:snapshot:cdpt-dev-staging-2024-jan-24",
-      "docker_image_tag": "development",
+      "environment_name": "development",
       "app_count": 1,
       "ec2_desired_capacity": 1,
       "ec2_max_size": 2,
@@ -27,7 +27,7 @@
       "env_name": "STAGING",
       "db_instance_identifier": "chaps-preprod-instance",
       "db_snapshot_identifier": "arn:aws:rds:eu-west-2:613903586696:snapshot:cdpt-dev-staging-2024-jan-24",
-      "docker_image_tag": "preproduction",
+      "environment_name": "staging",
       "app_count": 2,
       "ec2_desired_capacity": 2,
       "ec2_max_size": 3,
@@ -46,7 +46,7 @@
       "env_name": "PRODUCTION",
       "db_instance_identifier": "chaps-prod-instance",
       "db_snapshot_identifier": "arn:aws:rds:eu-west-2:613903586696:snapshot:chaps-prod-snapshot-2024-01-22",
-      "docker_image_tag": "production",
+      "environment_name": "production",
       "app_count": 2,
       "ec2_desired_capacity": 2,
       "ec2_max_size": 3,
diff --git a/terraform/environments/cdpt-chaps/ecs.tf b/terraform/environments/cdpt-chaps/ecs.tf
index f9f3e3048d3..59fec743346 100644
--- a/terraform/environments/cdpt-chaps/ecs.tf
+++ b/terraform/environments/cdpt-chaps/ecs.tf
@@ -74,7 +74,7 @@ resource "aws_ecs_task_definition" "chaps_task_definition" {
   container_definitions = jsonencode([
     {
       name      = "${local.application_name}-container"
-      image     = "${local.ecr_url}:${local.application_data.accounts[local.environment].docker_image_tag}"
+      image     = "${local.ecr_url}:${local.application_data.accounts[local.environment].environment_name}"
       cpu       = 1024
       memory    = 1024
       essential = true
diff --git a/terraform/environments/cdpt-chaps/route53.tf b/terraform/environments/cdpt-chaps/route53.tf
index d34737a0f59..1419fbea170 100644
--- a/terraform/environments/cdpt-chaps/route53.tf
+++ b/terraform/environments/cdpt-chaps/route53.tf
@@ -5,7 +5,7 @@ resource "aws_acm_certificate" "external" {
   domain_name       = "modernisation-platform.service.justice.gov.uk"
   validation_method = "DNS"
 
-  subject_alternative_names = ["${var.networking[0].application}.${var.networking[0].business-unit}-${local.environment}.modernisation-platform.service.justice.gov.uk"]
+  subject_alternative_names = ["${var.networking[0].application}.${var.networking[0].business-unit}-${local.application_data.accounts[local.environment].environment_name}.modernisation-platform.service.justice.gov.uk"]
   tags = {
     Environment = local.environment
   }
@@ -48,7 +48,7 @@ resource "aws_route53_record" "external" {
   provider = aws.core-vpc
 
   zone_id = data.aws_route53_zone.external.zone_id
-  name    = "${var.networking[0].application}.${var.networking[0].business-unit}-${local.environment}.modernisation-platform.service.justice.gov.uk"
+  name    = "${var.networking[0].application}.${var.networking[0].business-unit}-${local.application_data.accounts[local.environment].environment_name}.modernisation-platform.service.justice.gov.uk"
   type    = "A"
 
   alias {