diff --git a/backend/address2UPRN/Dockerfile b/backend/address2UPRN/Dockerfile
index d7485a3f..ac6af2a5 100644
--- a/backend/address2UPRN/Dockerfile
+++ b/backend/address2UPRN/Dockerfile
@@ -1,7 +1,7 @@
 FROM public.ecr.aws/lambda/python:3.10
 
 # Copy function code
-COPY app.py ${LAMBDA_TASK_ROOT}
+COPY main.py .
 
 # Set the handler
 CMD ["main.handler"]