diff --git a/main.tf b/main.tf
index 5ad1880..f061249 100644
--- a/main.tf
+++ b/main.tf
@@ -219,14 +219,14 @@ resource "aws_instance" "default" {
   dynamic "ebs_block_device" {
     for_each = var.ebs_block_device
     content {
-      delete_on_termination = lookup(ebs_block_device.value, "delete_on_termination", null)
+      delete_on_termination = lookup(ebs_block_device.value, "delete_on_termination", true)
       device_name           = ebs_block_device.value.device_name
-      encrypted             = lookup(ebs_block_device.value, "encrypted", null)
+      encrypted             = lookup(ebs_block_device.value, "encrypted", true)
       iops                  = lookup(ebs_block_device.value, "iops", null)
-      kms_key_id            = var.kms_key_id == "" ? join("", aws_kms_key.default[*].arn) : lookup(root_block_device.value, "kms_key_id", null)
+      kms_key_id            = var.kms_key_id == "" ? join("", aws_kms_key.default[*].arn) : lookup(ebs_block_device.value, "kms_key_id", null)
       snapshot_id           = lookup(ebs_block_device.value, "snapshot_id", null)
       volume_size           = lookup(ebs_block_device.value, "volume_size", null)
-      volume_type           = lookup(ebs_block_device.value, "volume_type", null)
+      volume_type           = lookup(ebs_block_device.value, "volume_type", "gp2")
       throughput            = lookup(ebs_block_device.value, "throughput", null)
       tags = merge(module.labels.tags,
         {
diff --git a/versions.tf b/versions.tf
index 5b25067..6567965 100644
--- a/versions.tf
+++ b/versions.tf
@@ -7,5 +7,9 @@ terraform {
       source  = "hashicorp/aws"
       version = ">= 5.13.1"
     }
+    tls = {
+      source  = "hashicorp/tls"
+      version = ">= 4.0"
+    }
   }
 }
\ No newline at end of file