diff --git a/modules/gcp_sql/instance.tf b/modules/gcp_sql/instance.tf
index 84c538d..bb401c7 100644
--- a/modules/gcp_sql/instance.tf
+++ b/modules/gcp_sql/instance.tf
@@ -29,7 +29,9 @@ resource "google_sql_database_instance" "this" {
     }
 
     ip_configuration {
-      require_ssl = true
+      ipv4_enabled    = false
+      private_network = var.vpc_network_link
+      require_ssl     = true
     }
 
     maintenance_window {
diff --git a/modules/gcp_sql/variables.tf b/modules/gcp_sql/variables.tf
index 1c3f225..6634829 100644
--- a/modules/gcp_sql/variables.tf
+++ b/modules/gcp_sql/variables.tf
@@ -53,6 +53,12 @@ variable "memory" {
   }
 }
 
+variable "vpc_network_link" {
+  description = "The resource name of the VPC e.g. projects/{project}/global/networks/{vpc_name}"
+  type        = string
+  nullable    = false
+}
+
 variable "deletion_protection" {
   description = "While set to true the instance cannot be deleted"
   type        = bool