diff --git a/tf/modules/ecs_cluster/main.tf b/tf/modules/ecs_cluster/main.tf
index 910294f2..b6763577 100644
--- a/tf/modules/ecs_cluster/main.tf
+++ b/tf/modules/ecs_cluster/main.tf
@@ -147,6 +147,7 @@ resource "aws_launch_template" "container_host" {
   network_interfaces {
     associate_public_ip_address = true
     delete_on_termination       = true
+    ipv6_address_count          = 1
     security_groups = [
       aws_security_group.container_host.id,
     ]