diff --git a/README.md b/README.md
index 8b27075..f7b3e3f 100644
--- a/README.md
+++ b/README.md
@@ -198,7 +198,7 @@ No modules.
 | <a name="input_ignore_value_changes"></a> [ignore\_value\_changes](#input\_ignore\_value\_changes) | Whether to create SSM Parameter and ignore changes in value | `bool` | `false` | no |
 | <a name="input_key_id"></a> [key\_id](#input\_key\_id) | KMS key ID or ARN for encrypting a `SecureString` | `string` | `null` | no |
 | <a name="input_name"></a> [name](#input\_name) | Name of the parameter. If the name contains a path (e.g., any forward slashes (`/`)), it must be fully qualified with a leading forward slash (`/`) | `string` | `null` | no |
-| <a name="input_overwrite"></a> [overwrite](#input\_overwrite) | Overwrite an existing parameter. If not specified, defaults to `false` during create operations to avoid overwriting existing resources and then `true` for all subsequent operations once the resource is managed by Terraform | `bool` | `false` | no |
+| <a name="input_overwrite"></a> [overwrite](#input\_overwrite) | Overwrite an existing parameter. If not specified, defaults to `false` during create operations to avoid overwriting existing resources and then `true` for all subsequent operations once the resource is managed by Terraform | `bool` | `null` | no |
 | <a name="input_region"></a> [region](#input\_region) | Region where the resource(s) will be managed. Defaults to the Region set in the provider configuration | `string` | `null` | no |
 | <a name="input_secure_type"></a> [secure\_type](#input\_secure\_type) | Whether the type of the value should be considered as secure or not | `bool` | `false` | no |
 | <a name="input_tags"></a> [tags](#input\_tags) | A map of tags to add to all resources | `map(string)` | `{}` | no |
diff --git a/variables.tf b/variables.tf
index 598b38a..ae1487e 100644
--- a/variables.tf
+++ b/variables.tf
@@ -59,7 +59,7 @@ variable "name" {
 variable "overwrite" {
   description = "Overwrite an existing parameter. If not specified, defaults to `false` during create operations to avoid overwriting existing resources and then `true` for all subsequent operations once the resource is managed by Terraform"
   type        = bool
-  default     = false
+  default     = null
 }
 
 variable "tier" {
diff --git a/wrappers/main.tf b/wrappers/main.tf
index 3280554..5301bea 100644
--- a/wrappers/main.tf
+++ b/wrappers/main.tf
@@ -10,7 +10,7 @@ module "wrapper" {
   ignore_value_changes = try(each.value.ignore_value_changes, var.defaults.ignore_value_changes, false)
   key_id               = try(each.value.key_id, var.defaults.key_id, null)
   name                 = try(each.value.name, var.defaults.name, null)
-  overwrite            = try(each.value.overwrite, var.defaults.overwrite, false)
+  overwrite            = try(each.value.overwrite, var.defaults.overwrite, null)
   region               = try(each.value.region, var.defaults.region, null)
   secure_type          = try(each.value.secure_type, var.defaults.secure_type, false)
   tags                 = try(each.value.tags, var.defaults.tags, {})