diff --git a/metadata/service/server/single.yml b/metadata/service/server/single.yml
index 264186c..397a0b6 100644
--- a/metadata/service/server/single.yml
+++ b/metadata/service/server/single.yml
@@ -3,9 +3,12 @@
 classes:
 - service.elasticsearch.support
 parameters:
+  _param:
+    elasticsearch_version: 2
   elasticsearch:
     server:
       enabled: true
+      version: ${_param:elasticsearch_version}
       bind:
         address: 0.0.0.0
         port: 9200