diff --git a/infrastructure/terraform/modules/lambda_sqs_trigger/variables.tf b/infrastructure/terraform/modules/lambda_sqs_trigger/variables.tf
index 0b8dffc0..c3127c74 100644
--- a/infrastructure/terraform/modules/lambda_sqs_trigger/variables.tf
+++ b/infrastructure/terraform/modules/lambda_sqs_trigger/variables.tf
@@ -9,6 +9,6 @@ variable "batch_size" {
 
 variable "maximum_concurrency" {
   type        = number
-  default     = 1
+  default     = null
   description = "Maximum number of concurrent Lambda invocations from SQS. null = no limit."
 }