diff --git a/opensearch-master/config.json b/opensearch-master/config.json
index 4c5f389..c36e157 100644
--- a/opensearch-master/config.json
+++ b/opensearch-master/config.json
@@ -71,6 +71,7 @@
     "9300/tcp": 9300
   },
   "environment": {
+    "OPENSEARCH_JAVA_OPTS": "-Xms2g, -Xmx2g",
     "OPENSEARCH_INITIAL_ADMIN_PASSWORD": "MyOpenSearch25!!"
   }
 }
\ No newline at end of file