diff --git a/ec2-worker/variables.tf b/ec2-worker/variables.tf
index 0f2416d..44155d1 100644
--- a/ec2-worker/variables.tf
+++ b/ec2-worker/variables.tf
@@ -107,7 +107,7 @@ variable "concourse_worker_instance_count" {
 
 variable "concourse_version" {
   description = "Concourse CI version to use. Defaults to the latest tested version"
-  default     = "5.5.1"
+  default     = "5.5.3"
   type        = string
 }
 
diff --git a/ecs-web/variables.tf b/ecs-web/variables.tf
index 3587a5c..56b36bb 100644
--- a/ecs-web/variables.tf
+++ b/ecs-web/variables.tf
@@ -27,7 +27,7 @@ variable "concourse_docker_image" {
 
 variable "concourse_version" {
   description = "Concourse CI version to use. Defaults to the latest tested version"
-  default     = "5.5.1"
+  default     = "5.5.3"
   type        = string
 }