diff --git a/modules/aws-ec2/main.tf b/modules/aws-ec2/main.tf
index e879a33..be730aa 100644
--- a/modules/aws-ec2/main.tf
+++ b/modules/aws-ec2/main.tf
@@ -107,13 +107,14 @@ resource "local_sensitive_file" "private_key" {
   filename = "${path.module}/ssh/id_rsa"
 }
 
-# resource "null_resource" "set_permission" {
-#   depends_on = [local_sensitive_file.private_key]
-#
-#   provisioner "local-exec" {
-#     command = "chmod 0600 ${local_sensitive_file.private_key.filename}"
-#   }
-# }
+# Only use this resource if you are using Linux or MacOS
+resource "null_resource" "set_permission" {
+  depends_on = [local_sensitive_file.private_key]
+
+  provisioner "local-exec" {
+    command = "chmod 0600 ${local_sensitive_file.private_key.filename}"
+  }
+}
 
 resource "local_file" "public_key" {
   content  = tls_private_key.ssh_key.public_key_openssh
diff --git a/modules/aws-ec2/readme.md b/modules/aws-ec2/readme.md
index d56b359..6c52968 100644
--- a/modules/aws-ec2/readme.md
+++ b/modules/aws-ec2/readme.md
@@ -34,7 +34,7 @@ tofu init
 cp .env.example .env
 ```
 
-6. Modify the `.env` and `variables.tf` file according to your needs. You can modify `DOMAIN` to your own domain, this will be used to generate SSL certificate by [Caddy](https://caddyserver.com/). If you want to configure your own certs instead of automatic HTTPS, you can leave `caddy` blank.
+6. Modify the `.env` and `variables.tf` file according to your needs. You can modify `DOMAIN` to your own domain, this will be used to generate SSL certificate by [Caddy](https://caddyserver.com/). If you want to configure your own certs instead of automatic HTTPS, you can leave `caddy` blank, you should also check `main.tf` file to make sure it works with your OS.
 
 7. Deploy the project
 ```bash