diff --git a/source/diagrams/10-4.1-customer-data-flow.mmd b/source/diagrams/10-4.1-customer-data-flow.mmd
index 45d0a6c..ef3efbe 100644
--- a/source/diagrams/10-4.1-customer-data-flow.mmd
+++ b/source/diagrams/10-4.1-customer-data-flow.mmd
@@ -20,7 +20,7 @@ graph LR
     subgraph Customer Logs
       Q[AWS Elasticache Redis Queue]
       Logstash[Logstash]
-      OS[Elasticsearch]
+      OS[Opensearch]
       OSD[Opensearch Dashboard<br>logs.fr.cloud.gov]
     end
     subgraph AWS Brokered Services VPC