diff --git a/deployment/lambda/walthamforest_etl/walthamforest_etl_lambda.tf b/deployment/lambda/walthamforest_etl/walthamforest_etl_lambda.tf
index e8e98be..22f03aa 100644
--- a/deployment/lambda/walthamforest_etl/walthamforest_etl_lambda.tf
+++ b/deployment/lambda/walthamforest_etl/walthamforest_etl_lambda.tf
@@ -11,6 +11,8 @@ data "aws_ecr_repository" "walthamforest_etl_ecr" {
 # SQS queue
 resource "aws_sqs_queue" "walthamforest_etl_queue" {
   name = "walthamforest_etl-queue"
+  visibility_timeout_seconds = 1800  # 30 minutes (>= 300s; ~6x rule of thumb)
+  receive_wait_time_seconds  = 20    # optional: long polling
 }