diff --git a/modules/network/main.tf b/modules/network/main.tf
index d3ac786..1906c9c 100644
--- a/modules/network/main.tf
+++ b/modules/network/main.tf
@@ -52,7 +52,7 @@ resource "google_compute_firewall" "allow_ssh" {
 }
 
 resource "google_compute_firewall" "front_to_back" {
-  name    = "front_to_back"
+  name    = "front-to-back"
   network = google_compute_network.vpc.id
 
   allow {
@@ -65,7 +65,7 @@ resource "google_compute_firewall" "front_to_back" {
 }
 
 resource "google_compute_firewall" "back_to_bdd" {
-  name    = "back_to_bdd"
+  name    = "back-to-bdd"
   network = google_compute_network.vpc.id
 
   allow {