diff --git a/infra/document-db.tf b/infra/document-db.tf
index e543b1c..c6cc84c 100644
--- a/infra/document-db.tf
+++ b/infra/document-db.tf
@@ -54,6 +54,6 @@ resource "aws_docdb_cluster_instance" "docdb_instances" {
   count              = 1
   identifier         = "docdb-instance-${count.index}"
   cluster_identifier = aws_docdb_cluster.docdb.id
-  instance_class     = "db.t4g.medium"
+  instance_class     = "db.t3.medium"
   apply_immediately = true
 }
\ No newline at end of file
diff --git a/infra/rds.tf b/infra/rds.tf
index 92c29e5..d7aa9a0 100644
--- a/infra/rds.tf
+++ b/infra/rds.tf
@@ -51,6 +51,7 @@ resource "aws_db_instance" "rds_clients" {
   publicly_accessible = true
   skip_final_snapshot = true
   db_subnet_group_name = aws_db_subnet_group.rds.name
+  network_type = "IPV4"
 }
 
 resource "aws_db_instance" "rds_order" {
@@ -66,6 +67,7 @@ resource "aws_db_instance" "rds_order" {
   publicly_accessible = true
   skip_final_snapshot = true
   db_subnet_group_name = aws_db_subnet_group.rds.name
+  network_type = "IPV4"
 }
 
 resource "aws_db_instance" "rds_production" {
@@ -81,4 +83,5 @@ resource "aws_db_instance" "rds_production" {
   publicly_accessible = true
   skip_final_snapshot = true
   db_subnet_group_name = aws_db_subnet_group.rds.name
+  network_type = "IPV4"
 }