diff --git a/monitoring.tf b/monitoring.tf
index 04a2ad5..69f231c 100644
--- a/monitoring.tf
+++ b/monitoring.tf
@@ -1,8 +1,8 @@
 locals {
   dlq_to_monitor = [
-    local.enable_group_events ? "${var.sqs_fifo_DL_queue_name}.fifo" : var.sqs_queue_name_dl,
-    var.enable_glue_create ? var.glue_create_config.sqs_queue_name_dl : "",
-    var.enable_glue_sync ? var.glue_sync_config.sqs_queue_name_dl : "",
+    local.enable_group_events ? lower("${var.sqs_fifo_DL_queue_name}.fifo") : lower(var.sqs_queue_name_dl),
+    var.enable_glue_create ? lower(var.glue_create_config.sqs_queue_name_dl) : "",
+    var.enable_glue_sync ? lower(var.glue_sync_config.sqs_queue_name_dl) : "",
   ]
 }