diff --git a/external-network/main.tf b/external-network/main.tf
index 9556f4f6fbeb7843ea6bf667529926244ff0f51b..c467378ec1b9068a4f5cc426e7a54dc99722229b 100644
--- a/external-network/main.tf
+++ b/external-network/main.tf
@@ -26,7 +26,7 @@ resource "openstack_networking_network_v2" "external_network" {
 resource "openstack_networking_subnet_v2" "external_subnet" {
   name            = "${var.name}subnet"
   network_id      = openstack_networking_network_v2.external_network.id
-  cidr            = "192.168.100.0/24"
+  cidr            = "192.168.0.0/24"
   ip_version      = 4
   dns_nameservers = ["172.20.0.137", "172.20.0.3", "8.8.8.8"]
   enable_dhcp     = var.enable_dhcp