diff --git a/terraform/variables.tf b/terraform/variables.tf
index d89a7c5..e1b82e1 100644
--- a/terraform/variables.tf
+++ b/terraform/variables.tf
@@ -1,3 +1,5 @@
 # terraform/variables.tf
 
 # update 4 (2026-04)
+
+# update 18 (2026-04)