diff --git a/README.md b/README.md
index 9d77e27..f4e1bad 100644
--- a/README.md
+++ b/README.md
@@ -99,8 +99,8 @@ such as extended backups, user management, and autoscaling.
 
 | Name | Description |
 |------|-------------|
-| <a name="output_cluster_endpoint"></a> [cluster\_endpoint](#output\_cluster\_endpoint) | n/a |
-| <a name="output_instance_endpoint"></a> [instance\_endpoint](#output\_instance\_endpoint) | n/a |
+| <a name="output_cluster_endpoint"></a> [cluster\_endpoint](#output\_cluster\_endpoint) | The cluster endpoint |
+| <a name="output_instance_endpoint"></a> [instance\_endpoint](#output\_instance\_endpoint) | The instance endpoint |
 
 ## Providers
 
diff --git a/main.tf b/main.tf
index 8dba422..a0f626f 100644
--- a/main.tf
+++ b/main.tf
@@ -133,7 +133,7 @@ module "db_event_subscription" {
 module "backup" {
   count = var.enable_enhanced_backups ? 1 : 0
 
-  source = "github.com/geekcell/terraform-aws-backup?ref=main"
+  source = "github.com/geekcell/terraform-aws-backup?ref=v1"
 
   # Vault name for this backup
   vault_name = "${var.cluster_identifier}-rds"
diff --git a/modules/db_event_subscription/main.tf b/modules/db_event_subscription/main.tf
index b64e73f..5beb495 100644
--- a/modules/db_event_subscription/main.tf
+++ b/modules/db_event_subscription/main.tf
@@ -13,7 +13,7 @@ resource "aws_db_event_subscription" "main" {
 }
 
 module "notification" {
-  source = "github.com/geekcell/terraform-aws-sns-email-notification?ref=v1.1"
+  source = "github.com/geekcell/terraform-aws-sns-email-notification?ref=v1"
 
   name            = var.name
   email_addresses = var.recipients
diff --git a/modules/db_proxy_secret/main.tf b/modules/db_proxy_secret/main.tf
index b0227c8..dba978e 100644
--- a/modules/db_proxy_secret/main.tf
+++ b/modules/db_proxy_secret/main.tf
@@ -27,7 +27,7 @@ resource "aws_secretsmanager_secret_version" "main" {
 }
 
 module "kms" {
-  source = "github.com/geekcell/terraform-aws-kms?ref=main"
+  source = "github.com/geekcell/terraform-aws-kms?ref=v1"
 
   alias = var.name
 
diff --git a/modules/rds_cluster/README.md b/modules/rds_cluster/README.md
index 01c28e5..768e91b 100644
--- a/modules/rds_cluster/README.md
+++ b/modules/rds_cluster/README.md
@@ -42,9 +42,9 @@
 
 | Name | Description |
 |------|-------------|
-| <a name="output_arn"></a> [arn](#output\_arn) | n/a |
-| <a name="output_endpoint"></a> [endpoint](#output\_endpoint) | n/a |
-| <a name="output_id"></a> [id](#output\_id) | n/a |
+| <a name="output_arn"></a> [arn](#output\_arn) | The ARN of the cluster |
+| <a name="output_endpoint"></a> [endpoint](#output\_endpoint) | The cluster endpoint |
+| <a name="output_id"></a> [id](#output\_id) | The ID of the cluster |
 
 ## Providers
 
diff --git a/modules/rds_cluster/main.tf b/modules/rds_cluster/main.tf
index 69b61e3..9d924e6 100644
--- a/modules/rds_cluster/main.tf
+++ b/modules/rds_cluster/main.tf
@@ -82,7 +82,7 @@ module "autoscaling" {
 
 module "kms" {
   for_each = toset(["storage"])
-  source   = "github.com/geekcell/terraform-aws-kms?ref=main"
+  source   = "github.com/geekcell/terraform-aws-kms?ref=v1"
   alias    = format("/rds/cluster/%s/%s", var.cluster_identifier, each.key)
 }
 
diff --git a/modules/rds_cluster/outputs.tf b/modules/rds_cluster/outputs.tf
index 6cf2e42..67bd56b 100644
--- a/modules/rds_cluster/outputs.tf
+++ b/modules/rds_cluster/outputs.tf
@@ -1,11 +1,14 @@
 output "arn" {
-  value = aws_rds_cluster.main.arn
+  description = "The ARN of the cluster"
+  value       = aws_rds_cluster.main.arn
 }
 
 output "id" {
-  value = aws_rds_cluster.main.id
+  description = "The ID of the cluster"
+  value       = aws_rds_cluster.main.id
 }
 
 output "endpoint" {
-  value = aws_rds_cluster.main.endpoint
+  description = "The cluster endpoint"
+  value       = aws_rds_cluster.main.endpoint
 }
diff --git a/modules/rds_cluster_instance/main.tf b/modules/rds_cluster_instance/main.tf
index 850dc21..8a34fa8 100644
--- a/modules/rds_cluster_instance/main.tf
+++ b/modules/rds_cluster_instance/main.tf
@@ -51,7 +51,7 @@ module "db_enhanced_monitoring" {
 module "kms" {
   for_each = toset(["performance_insights"])
 
-  source = "github.com/geekcell/terraform-aws-kms?ref=main"
+  source = "github.com/geekcell/terraform-aws-kms?ref=v1"
   alias  = format("alias/rds/cluster/%s/instance/%s/%s", var.identifier, var.identifier, each.key)
 }
 
diff --git a/outputs.tf b/outputs.tf
index 636e3a9..6b8fca0 100644
--- a/outputs.tf
+++ b/outputs.tf
@@ -1,7 +1,9 @@
 output "cluster_endpoint" {
-  value = module.rds_cluster.endpoint
+  description = "The cluster endpoint"
+  value       = module.rds_cluster.endpoint
 }
 
 output "instance_endpoint" {
-  value = module.rds_cluster_instance.endpoint
+  description = "The instance endpoint"
+  value       = module.rds_cluster_instance.endpoint
 }