diff --git a/es.tf b/es.tf
index d6e3661..130e149 100644
--- a/es.tf
+++ b/es.tf
@@ -2,7 +2,7 @@
 
 resource "aws_elasticsearch_domain" "ElasticsearchDomain" {
   domain_name           = "sondes-v2-7-9"
-  elasticsearch_version = "OpenSearch_2.5"
+  elasticsearch_version = "OpenSearch_2.9"
   cluster_config {
     dedicated_master_count   = 3
     dedicated_master_enabled = false