diff --git a/examples/postgresql_iam_cluster/main.tf b/examples/postgresql_iam_cluster/main.tf
index 26f85f1..f799822 100644
--- a/examples/postgresql_iam_cluster/main.tf
+++ b/examples/postgresql_iam_cluster/main.tf
@@ -48,9 +48,10 @@ module "rds_proxy" {
 
   secrets = {
     (local.db_username) = {
-      description = aws_secretsmanager_secret.superuser.description
-      arn         = aws_secretsmanager_secret.superuser.arn
-      kms_key_id  = aws_secretsmanager_secret.superuser.kms_key_id
+      description               = aws_secretsmanager_secret.superuser.description
+      arn                       = aws_secretsmanager_secret.superuser.arn
+      kms_key_id                = aws_secretsmanager_secret.superuser.kms_key_id
+      client_password_auth_type = "POSTGRES_MD5"
     }
   }
 
diff --git a/examples/postgresql_iam_instance/main.tf b/examples/postgresql_iam_instance/main.tf
index 7dc47c9..4f53e38 100644
--- a/examples/postgresql_iam_instance/main.tf
+++ b/examples/postgresql_iam_instance/main.tf
@@ -48,9 +48,10 @@ module "rds_proxy" {
 
   secrets = {
     (local.db_username) = {
-      description = aws_secretsmanager_secret.superuser.description
-      arn         = aws_secretsmanager_secret.superuser.arn
-      kms_key_id  = aws_secretsmanager_secret.superuser.kms_key_id
+      description               = aws_secretsmanager_secret.superuser.description
+      arn                       = aws_secretsmanager_secret.superuser.arn
+      kms_key_id                = aws_secretsmanager_secret.superuser.kms_key_id
+      client_password_auth_type = "POSTGRES_MD5"
     }
   }