diff --git a/template/rds.tmpl b/template/rds.tmpl
index 2f6b247..698c194 100644
--- a/template/rds.tmpl
+++ b/template/rds.tmpl
@@ -1,6 +1,6 @@
 
 module "rds" {
-  source               = "github.com/ministryofjustice/cloud-platform-terraform-rds-instance?ref=5.13"
+  source               = "github.com/ministryofjustice/cloud-platform-terraform-rds-instance?ref=5.13.1"
   cluster_name         = var.cluster_name
   cluster_state_bucket = var.cluster_state_bucket
   team_name            = var.team_name