diff --git a/README.md b/README.md
index 98cabb8..803b218 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,8 @@ Pair this pacakge with [@nasa-gcn/architect-functions-search](https://github.com
 3.  Amazon offers two flavors of managed OpenSearch: OpenSearch Service and OpenSearch Serverless. By default, this plugin will provision OpenSearch Serverless. If you want to use OpenSearch Service instead, then add a `@search` section to your `app.arc` file:
 
         @search
+        # Enable automatic software updates (disabled by default).
+        autoSoftwareUpdateEnabled true
         # See https://docs.aws.amazon.com/opensearch-service/latest/developerguide/supported-instance-types.html for supported instance types
         instanceType t3.small.search
         instanceCount 2
@@ -30,6 +32,8 @@ Pair this pacakge with [@nasa-gcn/architect-functions-search](https://github.com
         # master nodes are disabled.
         dedicatedMasterCount 3
         dedicatedMasterType t3.small.search
+        # Enable off-peak window for software updates (disabled by default).
+        offPeakWindowEnabled true
         # Use OpenSearch in sandbox mode; default is Elasticsearch.
         sandboxEngine opensearch
 
diff --git a/service.ts b/service.ts
index d9d4ddd..d6bd901 100644
--- a/service.ts
+++ b/service.ts
@@ -7,11 +7,13 @@
  */
 
 export function cloudformationResources({
+  autoSoftwareUpdateEnabled,
   availabilityZoneCount,
   dedicatedMasterCount,
   dedicatedMasterType,
   instanceCount,
   instanceType,
+  offPeakWindowEnabled,
   volumeSize,
 }: Record<string, string | undefined>) {
   if (!availabilityZoneCount)
@@ -80,6 +82,7 @@ export function cloudformationResources({
             },
           ],
         },
+        AutoSoftwareUpdateEnabled: Boolean(autoSoftwareUpdateEnabled),
         ClusterConfig: {
           DedicatedMasterCount,
           DedicatedMasterEnabled,
@@ -106,6 +109,9 @@ export function cloudformationResources({
           },
         },
         NodeToNodeEncryptionOptions: { Enabled: true },
+        OffPeakWindowOptions: {
+          Enabled: Boolean(offPeakWindowEnabled),
+        },
       },
     },
   }