diff --git a/terraform/modules/network/main.tf b/terraform/modules/network/main.tf
index 2633628..03bd27f 100644
--- a/terraform/modules/network/main.tf
+++ b/terraform/modules/network/main.tf
@@ -63,7 +63,7 @@ resource "google_compute_firewall" "backend_firewall" {
     ports    = ["8000"]
   }
 
-  source_ranges = ["frontend"]
+  source_tags = ["frontend"]
   target_tags = ["backend"]
   
 }
@@ -77,7 +77,7 @@ resource "google_compute_firewall" "database_firewall" {
     ports    = ["3306"]
   }
 
-  source_ranges = ["backend"]
+  source_tags = ["backend"]
   target_tags = ["database"]
   
 }