diff --git a/snapshots.tf b/snapshots.tf
index 26694a6..a12ab02 100644
--- a/snapshots.tf
+++ b/snapshots.tf
@@ -1,7 +1,7 @@
 # Even though taking snapshots is optional, a bucket will always be created
 # so that there's a place to put the snapshots if they are enabled.
 module "s3" {
-  source = "github.com/pbs/terraform-aws-s3-module?ref=3.0.8"
+  source = "github.com/pbs/terraform-aws-s3-module?ref=4.0.0"
 
   force_destroy = var.force_destroy