Update README.md
diff --git a/7/7.0/oap/README.md b/7/7.0/oap/README.md
index 350c391..10e7d7a 100644
--- a/7/7.0/oap/README.md
+++ b/7/7.0/oap/README.md
@@ -17,10 +17,10 @@
 $ docker run --name oap --restart always -d apache/skywalking-oap-server:7.0.0-es6
 ```
 
-## Start a `standlone` container with `elasticsearch` storage whose address is `elasticsearch:9200`
+## Start a `standlone` container with `elasticsearch7` storage whose address is `elasticsearch:9200`
 
 ```
-$ docker run --name oap --restart always -d -e SW_STORAGE=elasticsearch -e SW_STORAGE_ES_CLUSTER_NODES=elasticsearch:9200 apache/skywalking-oap-server:7.0.0-es6
+$ docker run --name oap --restart always -d -e SW_STORAGE=elasticsearch7 -e SW_STORAGE_ES_CLUSTER_NODES=elasticsearch:9200 apache/skywalking-oap-server:7.0.0-es6
 ```
 
 # Configuration