diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1340e5e..ad03738 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,11 @@
 
 ## Unreleased
 
+## v18.5.0.0
+* Upgrade to [Cumulus v18.5.0](https://github.com/nasa/cumulus/releases/tag/v18.5.0)
+* **NOTE** This version of Cumulus requires changes to the RDS database
+* For Serverless v2 RDS migration please see the cumulus [instructions](https://nasa.github.io/cumulus/docs/next/upgrade-notes/serverless-v2-upgrade/)
+
 ## v18.4.0.0
 * Upgrade to [Cumulus v18.4.0](https://github.com/nasa/cumulus/releases/tag/v18.4.0)
 * Add 'Docker in Docker' functionality by giving the container access to the
diff --git a/cumulus/main.tf b/cumulus/main.tf
index 6948085..f2e51a6 100644
--- a/cumulus/main.tf
+++ b/cumulus/main.tf
@@ -1,5 +1,5 @@
 module "cumulus" {
-  source = "https://github.com/nasa/cumulus/releases/download/v18.4.0/terraform-aws-cumulus.zip//tf-modules/cumulus"
+  source = "https://github.com/nasa/cumulus/releases/download/v18.5.0/terraform-aws-cumulus.zip/tf-modules/cumulus"
 
   cumulus_message_adapter_lambda_layer_version_arn = data.terraform_remote_state.daac.outputs.cma_layer_arn
 
diff --git a/data-persistence/main.tf b/data-persistence/main.tf
index 79200bb..41e30fc 100644
--- a/data-persistence/main.tf
+++ b/data-persistence/main.tf
@@ -1,5 +1,5 @@
 module "data_persistence" {
-  source = "https://github.com/nasa/cumulus/releases/download/v18.4.0/terraform-aws-cumulus.zip//tf-modules/data-persistence"
+  source = "https://github.com/nasa/cumulus/releases/download/v18.5.0/terraform-aws-cumulus.zip/tf-modules/data-persistence"
 
   prefix                = local.prefix
   subnet_ids            = data.aws_subnets.subnet_ids.ids