diff --git a/README.md b/README.md
index ed620fa9..b7b1586f 100644
--- a/README.md
+++ b/README.md
@@ -162,7 +162,7 @@ If you're looking to raise an issue with this module, please create a new issue
 
 | Name | Source | Version |
 |------|--------|---------|
-| <a name="module_s3-bucket"></a> [s3-bucket](#module\_s3-bucket) | github.com/ministryofjustice/modernisation-platform-terraform-s3-bucket | v6.3.0 |
+| <a name="module_s3-bucket"></a> [s3-bucket](#module\_s3-bucket) | github.com/ministryofjustice/modernisation-platform-terraform-s3-bucket | v6.4.0 |
 
 ## Resources
 
diff --git a/main.tf b/main.tf
index 2bea8e9b..c0d7d13c 100644
--- a/main.tf
+++ b/main.tf
@@ -8,7 +8,7 @@ data "aws_vpc" "shared" {
 
 module "s3-bucket" {
   count  = var.existing_bucket_name == "" ? 1 : 0
-  source = "github.com/ministryofjustice/modernisation-platform-terraform-s3-bucket?ref=v6.3.0"
+  source = "github.com/ministryofjustice/modernisation-platform-terraform-s3-bucket?ref=v6.4.0"
 
   providers = {
     aws.bucket-replication = aws.bucket-replication