diff --git a/opensearch-master/config.json b/opensearch-master/config.json
index 5b0a183..dbe5d9e 100644
--- a/opensearch-master/config.json
+++ b/opensearch-master/config.json
@@ -69,5 +69,9 @@
   "ports": {
     "9200/tcp": 9200,
     "9300/tcp": 9300
+  },
+  "environment": {
+    "OPENSEARCH_JAVA_OPTS": "-Xms{opensearch_heap} -Xmx{opensearch_heap}",
+    "OPENSEARCH_INITIAL_ADMIN_PASSWORD": "{admin_password}"
   }
 }
\ No newline at end of file