diff --git a/.github/workflows/deploy_terraform.yml b/.github/workflows/deploy_terraform.yml
index c8d79b03..67c1d5d8 100644
--- a/.github/workflows/deploy_terraform.yml
+++ b/.github/workflows/deploy_terraform.yml
@@ -105,7 +105,7 @@ jobs:
     needs: [determine_stage, shared_terraform]
     uses: ./.github/workflows/_build_image.yml
     with:
-      ecr_repo: postcodeSplitter-${{ needs.determine_stage.outputs.stage }}
+      ecr_repo: postcode_splitter-${{ needs.determine_stage.outputs.stage }}
       dockerfile_path: backend/postcode_splitter/handler/Dockerfile
       build_context: .
     secrets:
@@ -123,7 +123,7 @@ jobs:
   #     lambda_name: postcodeSplitter
   #     # lambda_path: infrastructure/terraform/lambda/postcode_splitter
   #     stage: ${{ needs.determine_stage.outputs.stage }}
-  #     ecr_repo: postcodeSplitter-${{ needs.determine_stage.outputs.stage }}
+  #     ecr_repo: postcode_splitter-${{ needs.determine_stage.outputs.stage }}
   #     image_digest: ${{ needs.postcodeSplitter_image.outputs.image_digest }}
   #   secrets:
   #     AWS_ACCESS_KEY_ID: ${{ secrets.DEV_AWS_ACCESS_KEY_ID }}
diff --git a/infrastructure/terraform/shared/main.tf b/infrastructure/terraform/shared/main.tf
index fa1007f2..0e572cc8 100644
--- a/infrastructure/terraform/shared/main.tf
+++ b/infrastructure/terraform/shared/main.tf
@@ -317,23 +317,23 @@ output "address2uprn_repository_url" {
 ################################################
 # Postcode Splitter – Lambda ECR
 ################################################
-module "postcodeSplitter_state_bucket" {
+module "postcode_splitter_state_bucket" {
   source      = "../modules/tf_state_bucket"
-  bucket_name = "postcodeSplitter-terraform-state"
+  bucket_name = "postcode_splitter-terraform-state"
 
 }
 
-output "postcodeSplitter_state_bucket_name" {
-  value = module.postcodeSplitter_state_bucket.bucket_name
+output "postcode_splitter_state_bucket_name" {
+  value = module.postcode_splitter_state_bucket.bucket_name
 }
 
-module "postcodeSplitter_registry" {
+module "postcode_splitter_registry" {
   source = "../modules/container_registry"
-  name   = "postcodeSplitter"
+  name   = "postcode_splitter"
   stage = var.stage
 
 }
 
-output "postcodeSplitter_repository_url" {
-  value = module.postcodeSplitter_registry.repository_url
+output "postcode_splitter_repository_url" {
+  value = module.postcode_splitter_registry.repository_url
 }
\ No newline at end of file