diff --git a/README.md b/README.md
index a2310c5..f81a885 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,8 @@
 # Terraform AWS Serverless App Module
 Terraform module to create AWS Serverless application.
 
-
 ##  How to use:
-```terraform
+```hcl
 module "pecan" {
   name            = "pecan"
   source          = "hazelops/sls-app/aws"
@@ -11,7 +10,7 @@ module "pecan" {
   vpc_id          = module.vpc.vpc_id
   public_subnets  = module.vpc.public_subnets
   private_subnets = module.vpc.private_subnets
-  security_groups = [aws_security_group.default_permissive.id]
+  security_groups = ["sg-xxxxxxxxxxxxxxxxx"]
   
   parameters = {
     "API_KEY": "demo"
@@ -26,18 +25,19 @@ module "pecan" {
 }
 ```
 
-
+<!-- BEGIN_TF_DOCS -->
 ## Requirements
 
 | Name | Version |
 |------|---------|
 | <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.0 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | ~> 5.0 |
 
 ## Providers
 
 | Name | Version |
 |------|---------|
-| <a name="provider_aws"></a> [aws](#provider\_aws) | n/a |
+| <a name="provider_aws"></a> [aws](#provider\_aws) | ~> 5.0 |
 
 ## Modules
 
@@ -59,15 +59,18 @@ module "pecan" {
 |------|-------------|------|---------|:--------:|
 | <a name="input_app_secrets"></a> [app\_secrets](#input\_app\_secrets) | List of SSM ParameterStore secret parameters - by default, /$var.env/$var.name/* | `list(any)` | `[]` | no |
 | <a name="input_env"></a> [env](#input\_env) | n/a | `any` | n/a | yes |
-| <a name="input_global_parameters"></a> [global\_parameters](#input\_global\_parameters) | n/a | `map(string)` | `{}` | no |
+| <a name="input_global_parameters"></a> [global\_parameters](#input\_global\_parameters) | Map of SSM ParameterStore global parameters to store - by default, /$var.env/global/* | `map(string)` | `{}` | no |
 | <a name="input_global_secrets"></a> [global\_secrets](#input\_global\_secrets) | List of SSM ParameterStore global secrets - by default, /$var.env/global/* | `list(any)` | `[]` | no |
+| <a name="input_join_lists"></a> [join\_lists](#input\_join\_lists) | Whether to join lists like subnets and security groups into a one SSM parameter string with comma separator | `bool` | `false` | no |
 | <a name="input_name"></a> [name](#input\_name) | n/a | `any` | n/a | yes |
-| <a name="input_parameters"></a> [parameters](#input\_parameters) | n/a | `map(string)` | n/a | yes |
+| <a name="input_parameters"></a> [parameters](#input\_parameters) | Map of SSM ParameterStore parameters to store - by default, /$var.env/$var.name/* | `map(string)` | n/a | yes |
 | <a name="input_private_subnets"></a> [private\_subnets](#input\_private\_subnets) | VPC Private subnets to place SLS resources | `list(any)` | `[]` | no |
 | <a name="input_public_subnets"></a> [public\_subnets](#input\_public\_subnets) | VPC Public subnets to place SLS resources | `list(any)` | `[]` | no |
 | <a name="input_security_groups"></a> [security\_groups](#input\_security\_groups) | Security groups to assign to SLS | `list(any)` | `[]` | no |
-| <a name="input_vpc_id"></a> [vpc\_id](#input\_vpc\_id) | AWS VPC ID | `string` | `""` | no |
+| <a name="input_serialize_lists"></a> [serialize\_lists](#input\_serialize\_lists) | Whether to serialize lists like subnets and security groups into a one SSM parameter | `bool` | `true` | no |
+| <a name="input_vpc_id"></a> [vpc\_id](#input\_vpc\_id) | AWS VPC ID | `string` | `"-"` | no |
 
 ## Outputs
 
-No outputs.
\ No newline at end of file
+No outputs.
+<!-- END_TF_DOCS -->
diff --git a/main.tf b/main.tf
index e7412b9..17f6dbb 100644
--- a/main.tf
+++ b/main.tf
@@ -3,9 +3,8 @@ resource "aws_ssm_parameter" "sls_parameter" {
 
   name = "/${var.env}/${var.name}/${each.key}"
 
-  value     = each.value
-  type      = "String"
-  overwrite = true
+  value = each.value
+  type  = "String"
 }
 
 resource "aws_ssm_parameter" "sls_global_parameter" {
@@ -13,9 +12,8 @@ resource "aws_ssm_parameter" "sls_global_parameter" {
 
   name = "/${var.env}/global/${each.key}"
 
-  value     = each.value
-  type      = "String"
-  overwrite = true
+  value = each.value
+  type  = "String"
 }
 
 module "secrets" {
diff --git a/variables.tf b/variables.tf
index d9186d5..72223ca 100644
--- a/variables.tf
+++ b/variables.tf
@@ -2,12 +2,14 @@ variable "name" {}
 variable "env" {}
 
 variable "parameters" {
-  type = map(string)
+  type        = map(string)
+  description = "Map of SSM ParameterStore parameters to store - by default, /$var.env/$var.name/*"
 }
 
 variable "global_parameters" {
-  type    = map(string)
-  default = {}
+  type        = map(string)
+  description = "Map of SSM ParameterStore global parameters to store - by default, /$var.env/global/*"
+  default     = {}
 }
 
 variable "app_secrets" {
diff --git a/versions.tf b/versions.tf
index 77ef34b..802f8c4 100644
--- a/versions.tf
+++ b/versions.tf
@@ -1,7 +1,8 @@
 terraform {
   required_providers {
     aws = {
-      source = "hashicorp/aws"
+      source  = "hashicorp/aws"
+      version = "~> 5.0"
     }
   }
   required_version = ">= 1.0"