update README.md

shi-yuan · shi-yuan · commit c00915529d15 · 2017-09-04T21:30:50.000+08:00
diff --git a/README.md b/README.md
@@ -39,6 +39,7 @@ Elasticsearch-SQL
 **5.4.3** [![5.4.3 Build Status](https://travis-ci.org/NLPchina/elasticsearch-sql.svg?branch=elastic5.4.3)](https://travis-ci.org/NLPchina/elasticsearch-sql)
 **5.5.0** [![5.5.0 Build Status](https://travis-ci.org/NLPchina/elasticsearch-sql.svg?branch=elastic5.5.0)](https://travis-ci.org/NLPchina/elasticsearch-sql)
 **5.5.1** [![5.5.1 Build Status](https://travis-ci.org/NLPchina/elasticsearch-sql.svg?branch=elastic5.5.1)](https://travis-ci.org/NLPchina/elasticsearch-sql)
+**5.5.2** [![5.5.2 Build Status](https://travis-ci.org/NLPchina/elasticsearch-sql.svg?branch=elastic5.5.2)](https://travis-ci.org/NLPchina/elasticsearch-sql)
 
 Query elasticsearch using familiar SQL syntax.
 You can also use ES functions in SQL.
@@ -98,6 +99,7 @@ Versions
 | 5.4.3                 | 5.4.3.0        | delete commands not supported  | elastic5.4.3 |
 | 5.5.0                 | 5.5.0.1        | delete commands not supported  | elastic5.5.0 |
 | 5.5.1                 | 5.5.1.0        | delete commands not supported  | elastic5.5.1 |
+| 5.5.2                 | 5.5.2.0        | delete commands not supported  | elastic5.5.2 |
 
 ### Elasticsearch 1.x
 ````
@@ -262,6 +264,11 @@ Versions
 ./bin/elasticsearch-plugin install https://github.com/NLPchina/elasticsearch-sql/releases/download/5.5.1.0/elasticsearch-sql-5.5.1.0.zip
 ````
 
+### Elasticsearch 5.5.2
+````
+./bin/elasticsearch-plugin install https://github.com/NLPchina/elasticsearch-sql/releases/download/5.5.2.0/elasticsearch-sql-5.5.2.0.zip
+````
+
 After doing this, you need to restart the Elasticsearch server. Otherwise you may get errors like `Invalid index name [sql], must not start with '']; ","status":400}`.
 
 ## Basic Usage
