diff --git a/pom.xml b/pom.xml
index ff4de1e..f78451f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -30,7 +30,7 @@
 		<dependency>
 		    <groupId>com.thoughtworks.xstream</groupId>
 		    <artifactId>xstream</artifactId>
-		    <version>1.4.8</version>
+		    <version>1.4.18</version>
 		</dependency>
 		<dependency>
 		    <groupId>org.apache.solr</groupId>