diff --git a/docs-2.0/3.ngql-guide/15.full-text-index-statements/1.search-with-text-based-index.md b/docs-2.0/3.ngql-guide/15.full-text-index-statements/1.search-with-text-based-index.md
index f391ae5e308..8269278eb28 100644
--- a/docs-2.0/3.ngql-guide/15.full-text-index-statements/1.search-with-text-based-index.md
+++ b/docs-2.0/3.ngql-guide/15.full-text-index-statements/1.search-with-text-based-index.md
@@ -77,7 +77,7 @@ LOOKUP ON {<tag> | <edge_type>} WHERE <expression> [YIELD <return_list>];
 nebula> CREATE SPACE IF NOT EXISTS basketballplayer (partition_num=3,replica_factor=1, vid_type=fixed_string(30));
 
 // This example signs in the text service.
-nebula> SIGN IN TEXT SERVICE (127.0.0.1:9200);
+nebula> SIGN IN TEXT SERVICE (127.0.0.1:9200, HTTP);
 
 // This example switches the graph space.
 nebula> USE basketballplayer;
diff --git a/docs-2.0/4.deployment-and-installation/6.deploy-text-based-index/2.deploy-es.md b/docs-2.0/4.deployment-and-installation/6.deploy-text-based-index/2.deploy-es.md
index 5b6225c3dd3..c499f832dc5 100644
--- a/docs-2.0/4.deployment-and-installation/6.deploy-text-based-index/2.deploy-es.md
+++ b/docs-2.0/4.deployment-and-installation/6.deploy-text-based-index/2.deploy-es.md
@@ -77,13 +77,13 @@ When the Elasticsearch cluster is deployed, use the `SIGN IN` statement to sign
 ### Syntax
 
 ```ngql
-SIGN IN TEXT SERVICE [(<elastic_ip:port> [,"<username>", "<password>"]), (<elastic_ip:port>), ...];
+SIGN IN TEXT SERVICE (<elastic_ip:port>, {HTTP | HTTPS} [,"<username>", "<password>"]) [, (<elastic_ip:port>, ...)];
 ```
 
 ### Example
 
 ```ngql
-nebula> SIGN IN TEXT SERVICE (127.0.0.1:9200);
+nebula> SIGN IN TEXT SERVICE (127.0.0.1:9200, HTTP);
 ```
 
 !!! Note