diff --git a/README.md b/README.md
index 2edcdd8..6844547 100644
--- a/README.md
+++ b/README.md
@@ -101,7 +101,7 @@ Available targets:
 | Name | Version |
 |------|---------|
 | <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.3 |
-| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 2.0 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 5.21.0 |
 | <a name="requirement_local"></a> [local](#requirement\_local) | >= 1.3 |
 | <a name="requirement_random"></a> [random](#requirement\_random) | >= 1.0 |
 
@@ -109,7 +109,7 @@ Available targets:
 
 | Name | Version |
 |------|---------|
-| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 2.0 |
+| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 5.21.0 |
 | <a name="provider_random"></a> [random](#provider\_random) | >= 1.0 |
 
 ## Modules
@@ -142,6 +142,7 @@ Available targets:
 |------|-------------|------|---------|:--------:|
 | <a name="input_additional_tag_map"></a> [additional\_tag\_map](#input\_additional\_tag\_map) | Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`.<br>This is for some rare cases where resources want additional configuration of tags<br>and therefore take a list of maps with tag key, value, and additional configuration. | `map(string)` | `{}` | no |
 | <a name="input_allow_ingress_from_self"></a> [allow\_ingress\_from\_self](#input\_allow\_ingress\_from\_self) | Adds the Document DB security group itself as a source for ingress rules. Useful when this security group will be shared with applications. | `bool` | `false` | no |
+| <a name="input_allow_major_version_upgrade"></a> [allow\_major\_version\_upgrade](#input\_allow\_major\_version\_upgrade) | Specifies whether major version upgrades are allowed. See https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/docdb_cluster#allow_major_version_upgrade | `bool` | `false` | no |
 | <a name="input_allowed_cidr_blocks"></a> [allowed\_cidr\_blocks](#input\_allowed\_cidr\_blocks) | List of CIDR blocks to be allowed to connect to the DocumentDB cluster | `list(string)` | `[]` | no |
 | <a name="input_allowed_egress_cidr_blocks"></a> [allowed\_egress\_cidr\_blocks](#input\_allowed\_egress\_cidr\_blocks) | List of CIDR blocks to be allowed to send traffic outside of the DocumentDB cluster | `list(string)` | <pre>[<br>  "0.0.0.0/0"<br>]</pre> | no |
 | <a name="input_allowed_security_groups"></a> [allowed\_security\_groups](#input\_allowed\_security\_groups) | List of existing Security Groups to be allowed to connect to the DocumentDB cluster | `list(string)` | `[]` | no |
diff --git a/docs/terraform.md b/docs/terraform.md
index ca6a004..a2e6e99 100644
--- a/docs/terraform.md
+++ b/docs/terraform.md
@@ -4,7 +4,7 @@
 | Name | Version |
 |------|---------|
 | <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.3 |
-| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 2.0 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 5.21.0 |
 | <a name="requirement_local"></a> [local](#requirement\_local) | >= 1.3 |
 | <a name="requirement_random"></a> [random](#requirement\_random) | >= 1.0 |
 
@@ -12,7 +12,7 @@
 
 | Name | Version |
 |------|---------|
-| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 2.0 |
+| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 5.21.0 |
 | <a name="provider_random"></a> [random](#provider\_random) | >= 1.0 |
 
 ## Modules
@@ -45,6 +45,7 @@
 |------|-------------|------|---------|:--------:|
 | <a name="input_additional_tag_map"></a> [additional\_tag\_map](#input\_additional\_tag\_map) | Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`.<br>This is for some rare cases where resources want additional configuration of tags<br>and therefore take a list of maps with tag key, value, and additional configuration. | `map(string)` | `{}` | no |
 | <a name="input_allow_ingress_from_self"></a> [allow\_ingress\_from\_self](#input\_allow\_ingress\_from\_self) | Adds the Document DB security group itself as a source for ingress rules. Useful when this security group will be shared with applications. | `bool` | `false` | no |
+| <a name="input_allow_major_version_upgrade"></a> [allow\_major\_version\_upgrade](#input\_allow\_major\_version\_upgrade) | Specifies whether major version upgrades are allowed. See https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/docdb_cluster#allow_major_version_upgrade | `bool` | `false` | no |
 | <a name="input_allowed_cidr_blocks"></a> [allowed\_cidr\_blocks](#input\_allowed\_cidr\_blocks) | List of CIDR blocks to be allowed to connect to the DocumentDB cluster | `list(string)` | `[]` | no |
 | <a name="input_allowed_egress_cidr_blocks"></a> [allowed\_egress\_cidr\_blocks](#input\_allowed\_egress\_cidr\_blocks) | List of CIDR blocks to be allowed to send traffic outside of the DocumentDB cluster | `list(string)` | <pre>[<br>  "0.0.0.0/0"<br>]</pre> | no |
 | <a name="input_allowed_security_groups"></a> [allowed\_security\_groups](#input\_allowed\_security\_groups) | List of existing Security Groups to be allowed to connect to the DocumentDB cluster | `list(string)` | `[]` | no |
diff --git a/examples/complete/versions.tf b/examples/complete/versions.tf
index e5b2bea..64ee71a 100644
--- a/examples/complete/versions.tf
+++ b/examples/complete/versions.tf
@@ -4,7 +4,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = ">= 2.0"
+      version = ">= 5.21.0"
     }
     local = {
       source  = "hashicorp/local"
diff --git a/main.tf b/main.tf
index 8903792..496678b 100644
--- a/main.tf
+++ b/main.tf
@@ -79,6 +79,7 @@ resource "aws_docdb_cluster" "default" {
   engine                          = var.engine
   engine_version                  = var.engine_version
   enabled_cloudwatch_logs_exports = var.enabled_cloudwatch_logs_exports
+  allow_major_version_upgrade     = var.allow_major_version_upgrade
   tags                            = module.this.tags
 }
 
diff --git a/variables.tf b/variables.tf
index 5f17a48..f622a4f 100644
--- a/variables.tf
+++ b/variables.tf
@@ -233,3 +233,9 @@ variable "ssm_parameter_path_prefix" {
   default     = "/docdb/master-password/"
   description = "The path prefix for the created SSM parameter e.g. '/docdb/master-password/dev'. `ssm_parameter_enabled` must be set to `true` for this to take affect."
 }
+
+variable "allow_major_version_upgrade" {
+  type        = bool
+  description = "Specifies whether major version upgrades are allowed. See https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/docdb_cluster#allow_major_version_upgrade"
+  default     = false
+}
diff --git a/versions.tf b/versions.tf
index 5082d7f..04c7896 100644
--- a/versions.tf
+++ b/versions.tf
@@ -4,7 +4,7 @@ terraform {
   required_providers {
     aws = {
       source  = "hashicorp/aws"
-      version = ">= 2.0"
+      version = ">= 5.21.0"
     }
     local = {
       source  = "hashicorp/local"