diff --git a/terraform/environments/dev/main.tf b/terraform/environments/dev/main.tf
index 2545738..f3dc69f 100644
--- a/terraform/environments/dev/main.tf
+++ b/terraform/environments/dev/main.tf
@@ -27,9 +27,9 @@ module "network"{
 module "compute"{
     source = "../../modules/compute"
 
-    tp07-frontend = var.tp07-frontend
-    tp07-backend = var.tp07-backend
-    tp07-database = var.tp07-database
+    tp07-frontend = module.network.subnets_ids["frontend"]
+    tp07-backend = module.network.subnets_ids["backend"]
+    tp07-database = module.network.subnets_ids["database"]
     zone = var.zone
     instance_type = var.instance_type
 }
diff --git a/terraform/environments/dev/variables.tf b/terraform/environments/dev/variables.tf
index 8a16ea0..45d8db4 100644
--- a/terraform/environments/dev/variables.tf
+++ b/terraform/environments/dev/variables.tf
@@ -40,24 +40,6 @@ variable "ssh_source_ranges"{
     default = "0.0.0.0/0"
 }
 
-variable "tp07-frontend"{
-    description = "sous réseau frontend"
-    type = string
-    default = "tp07-frontend"
-}
-
-variable "tp07-backend"{
-    description = "sous réseau backend"
-    type = string
-    default = "tp07-backend"
-}
-
-variable "tp07-database"{
-    description = "sous réseau database"
-    type = string
-    default = "tp07-database"
-}
-
 variable "zone"{
     description = "region du projet"
     type = string