diff --git a/modules/cloudrun/main.tf b/modules/cloudrun/main.tf
index 50bb8c8..5501eeb 100644
--- a/modules/cloudrun/main.tf
+++ b/modules/cloudrun/main.tf
@@ -48,7 +48,9 @@ resource "google_cloud_run_service" "cloudrun" {
       }
     }
     spec {
-      service_account_name = data.google_service_account.service_account.email
+      service_account_name  = data.google_service_account.service_account.email
+      container_concurrency = 1
+
       dynamic "containers" {
         for_each = var.containers
         content {
diff --git a/modules/cloudrun/variables.tf b/modules/cloudrun/variables.tf
index 37c0967..af6d345 100644
--- a/modules/cloudrun/variables.tf
+++ b/modules/cloudrun/variables.tf
@@ -8,7 +8,7 @@ variable "min_instances" {
 }
 variable "max_instances" {
   type    = string
-  default = "5"
+  default = "100"
 }
 
 variable "regions" {