diff --git a/infrastructure/terraform/lambda/_template/variables.tf b/infrastructure/terraform/lambda/_template/variables.tf
index 0a3092ee..63f60cb6 100644
--- a/infrastructure/terraform/lambda/_template/variables.tf
+++ b/infrastructure/terraform/lambda/_template/variables.tf
@@ -25,7 +25,7 @@ variable "maximum_concurrency" {
 
 variable "batch_size" {
   type    = number
-  default = 1
+  default = 5
 }
 
 locals {