diff --git a/pom.xml b/pom.xml
old mode 100755
new mode 100644
index ea3575f..b9f1628
--- a/pom.xml
+++ b/pom.xml
@@ -90,7 +90,7 @@
             <dependency>
                 <groupId>org.elasticsearch</groupId>
                 <artifactId>elasticsearch</artifactId>
-                <version>2.4.0</version>
+                <version>6.8.17</version>
             </dependency>
             <dependency>
                 <groupId>org.bouncycastle</groupId>