diff --git a/.travis.yml b/.travis.yml
index 82cc9ae7..c6a0fb8e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,7 +17,7 @@ before_install:
   # update to java 8
   - sudo update-java-alternatives -s java-8-oracle
   - export JAVA_HOME=/usr/lib/jvm/java-8-oracle
-  - wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.6.3.deb && sudo dpkg -i --force-confnew elasticsearch-5.6.3.deb
+  - wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.6.4.deb && sudo dpkg -i --force-confnew elasticsearch-5.6.4.deb
   - sudo cp ./src/test/resources/elasticsearch.yml /etc/elasticsearch/elasticsearch.yml
   - sudo cat /etc/elasticsearch/elasticsearch.yml
   - sudo java -version
diff --git a/README.md b/README.md
index 08b75a76..50f9b5f0 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,8 @@ Elasticsearch-SQL
 **5.6.1** [![5.6.1 Build Status](https://travis-ci.org/NLPchina/elasticsearch-sql.svg?branch=elastic5.6.1)](https://travis-ci.org/NLPchina/elasticsearch-sql)
 **5.6.2** [![5.6.2 Build Status](https://travis-ci.org/NLPchina/elasticsearch-sql.svg?branch=elastic5.6.2)](https://travis-ci.org/NLPchina/elasticsearch-sql)
 **5.6.3** [![5.6.3 Build Status](https://travis-ci.org/NLPchina/elasticsearch-sql.svg?branch=elastic5.6.3)](https://travis-ci.org/NLPchina/elasticsearch-sql)
+<br/>
+**5.6.4** [![5.6.4 Build Status](https://travis-ci.org/NLPchina/elasticsearch-sql.svg?branch=elastic5.6.4)](https://travis-ci.org/NLPchina/elasticsearch-sql)
 
 Query elasticsearch using familiar SQL syntax.
 You can also use ES functions in SQL.
@@ -116,6 +118,7 @@ Versions
 | 5.6.1                 | 5.6.1.0        | delete commands not supported  | elastic5.6.1 |
 | 5.6.2                 | 5.6.2.0        | delete commands not supported  | elastic5.6.2 |
 | 5.6.3                 | 5.6.3.0        | delete commands not supported  | elastic5.6.3 |
+| 5.6.4                 | 5.6.4.0        | delete commands not supported  | elastic5.6.4 |
 
 ### Elasticsearch 1.x
 ````
@@ -310,6 +313,11 @@ Versions
 ./bin/elasticsearch-plugin install https://github.com/NLPchina/elasticsearch-sql/releases/download/5.6.3.0/elasticsearch-sql-5.6.3.0.zip
 ````
 
+### Elasticsearch 5.6.4
+````
+./bin/elasticsearch-plugin install https://github.com/NLPchina/elasticsearch-sql/releases/download/5.6.4.0/elasticsearch-sql-5.6.4.0.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
diff --git a/pom.xml b/pom.xml
index 0e1b0a3a..98647764 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>org.nlpcn</groupId>
 	<artifactId>elasticsearch-sql</artifactId>
-	<version>5.6.3.4</version>
+	<version>5.6.4.0</version>
 	<packaging>jar</packaging>
 	<description>Query elasticsearch using SQL</description>
 	<name>elasticsearch-sql</name>
@@ -47,7 +47,7 @@
 		<elasticsearch.plugin.name>sql</elasticsearch.plugin.name>
 		<elasticsearch.plugin.site>true</elasticsearch.plugin.site>
 		<elasticsearch.plugin.jvm>true</elasticsearch.plugin.jvm>
-		<elasticsearch.version>5.6.3</elasticsearch.version>
+		<elasticsearch.version>5.6.4</elasticsearch.version>
 		<elasticsearch.plugin.classname>org.elasticsearch.plugin.nlpcn.SqlPlug</elasticsearch.plugin.classname>
 	</properties>