diff --git a/modules/ssh-key/README.md b/modules/ssh-key/README.md
index 3012643..b285b99 100644
--- a/modules/ssh-key/README.md
+++ b/modules/ssh-key/README.md
@@ -9,14 +9,14 @@ This module creates following resources.
 
 | Name | Version |
 |------|---------|
-| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.5 |
+| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.6 |
 | <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 4.22 |
 
 ## Providers
 
 | Name | Version |
 |------|---------|
-| <a name="provider_aws"></a> [aws](#provider\_aws) | 5.19.0 |
+| <a name="provider_aws"></a> [aws](#provider\_aws) | 5.48.0 |
 
 ## Modules
 
@@ -35,7 +35,7 @@ This module creates following resources.
 | Name | Description | Type | Default | Required |
 |------|-------------|------|---------|:--------:|
 | <a name="input_name"></a> [name](#input\_name) | (Required) The name of the SSH key pair. | `string` | n/a | yes |
-| <a name="input_public_key"></a> [public\_key](#input\_public\_key) | (Optional) The public key material. | `string` | n/a | yes |
+| <a name="input_public_key"></a> [public\_key](#input\_public\_key) | (Required) The public key material. | `string` | n/a | yes |
 | <a name="input_module_tags_enabled"></a> [module\_tags\_enabled](#input\_module\_tags\_enabled) | (Optional) Whether to create AWS Resource Tags for the module informations. | `bool` | `true` | no |
 | <a name="input_resource_group_description"></a> [resource\_group\_description](#input\_resource\_group\_description) | (Optional) The description of Resource Group. | `string` | `"Managed by Terraform."` | no |
 | <a name="input_resource_group_enabled"></a> [resource\_group\_enabled](#input\_resource\_group\_enabled) | (Optional) Whether to create Resource Group to find and group AWS resources which are created by this module. | `bool` | `true` | no |
@@ -50,5 +50,6 @@ This module creates following resources.
 | <a name="output_fingerprint"></a> [fingerprint](#output\_fingerprint) | The MD5 public key fingerprint as specified in section 4 of RFC 4716. |
 | <a name="output_id"></a> [id](#output\_id) | The ID of the SSH key pair. |
 | <a name="output_name"></a> [name](#output\_name) | The name of the SSH key pair. |
+| <a name="output_public_key"></a> [public\_key](#output\_public\_key) | The public key material. |
 | <a name="output_type"></a> [type](#output\_type) | The type of the SSH key pair. |
 <!-- END OF PRE-COMMIT-TERRAFORM DOCS HOOK -->
diff --git a/modules/ssh-key/main.tf b/modules/ssh-key/main.tf
index 7a1fef3..47ab41d 100644
--- a/modules/ssh-key/main.tf
+++ b/modules/ssh-key/main.tf
@@ -14,19 +14,13 @@ locals {
   } : {}
 }
 
-locals {
-  strategy = {
-    "CLUSTER"   = "cluster"
-    "PARTITION" = "partition"
-    "SPREAD"    = "spread"
-  }
-}
-
 
 ###################################################
 # SSH Key Pair for EC2 Instances
 ###################################################
 
+# INFO: Not supported attributes
+# - `key_name_prefix`
 resource "aws_key_pair" "this" {
   key_name   = var.name
   public_key = var.public_key
diff --git a/modules/ssh-key/outputs.tf b/modules/ssh-key/outputs.tf
index fc68823..806d5e0 100644
--- a/modules/ssh-key/outputs.tf
+++ b/modules/ssh-key/outputs.tf
@@ -13,6 +13,11 @@ output "name" {
   value       = aws_key_pair.this.key_name
 }
 
+output "public_key" {
+  description = "The public key material."
+  value       = aws_key_pair.this.public_key
+}
+
 output "fingerprint" {
   description = "The MD5 public key fingerprint as specified in section 4 of RFC 4716."
   value       = aws_key_pair.this.fingerprint
@@ -22,3 +27,11 @@ output "type" {
   description = "The type of the SSH key pair."
   value       = aws_key_pair.this.key_type
 }
+
+# output "debug" {
+#   value = {
+#     for k, v in aws_key_pair.this :
+#     k => v
+#     if !contains(["id", "key_name", "key_name_prefix", "arn", "key_pair_id", "fingerprint", "key_type", "public_key", "tags", "tags_all"], k)
+#   }
+# }
diff --git a/modules/ssh-key/variables.tf b/modules/ssh-key/variables.tf
index 3598df9..5e3d687 100644
--- a/modules/ssh-key/variables.tf
+++ b/modules/ssh-key/variables.tf
@@ -5,7 +5,7 @@ variable "name" {
 }
 
 variable "public_key" {
-  description = "(Optional) The public key material."
+  description = "(Required) The public key material."
   type        = string
   nullable    = false
 }
diff --git a/modules/ssh-key/versions.tf b/modules/ssh-key/versions.tf
index 16131a3..7384768 100644
--- a/modules/ssh-key/versions.tf
+++ b/modules/ssh-key/versions.tf
@@ -1,5 +1,5 @@
 terraform {
-  required_version = ">= 1.5"
+  required_version = ">= 1.6"
 
   required_providers {
     aws = {