diff --git a/mongodb/variables.tf b/mongodb/variables.tf
index e69bd6f..b3f127f 100644
--- a/mongodb/variables.tf
+++ b/mongodb/variables.tf
@@ -30,7 +30,9 @@ variable "mongodb_instance_flavor" {
 variable "mongodb_instance_options" {
   description = "options for mongodb"
   type = object({
-    type = string
+    type                       = string
+    snapshot_retention_days    = number
+    point_in_time_window_hours = number
   })
 }