diff --git a/README.md b/README.md
index 2a6ede4..8a28e37 100644
--- a/README.md
+++ b/README.md
@@ -133,6 +133,7 @@ module "aurora_db_postgres96" {
   replica_count                   = "1"
   security_groups                 = ["${aws_security_group.allow_all.id}"]
   instance_type                   = "db.r4.large"
+  port                            = "5432"
   username                        = "root"
   password                        = "changeme"
   backup_retention_period         = "5"
diff --git a/main.tf b/main.tf
index 08d58af..4766e35 100644
--- a/main.tf
+++ b/main.tf
@@ -133,6 +133,7 @@
   *   replica_count                   = "1"
   *   security_groups                 = ["${aws_security_group.allow_all.id}"]
   *   instance_type                   = "db.r4.large"
+  *   port                            = "5432"
   *   username                        = "root"
   *   password                        = "changeme"
   *   backup_retention_period         = "5"