diff --git a/pom.xml b/pom.xml
index 2e600bd..92518af 100644
--- a/pom.xml
+++ b/pom.xml
@@ -52,7 +52,7 @@
         <dependency>
             <groupId>com.thoughtworks.xstream</groupId>
             <artifactId>xstream</artifactId>
-            <version>1.4.9</version>
+            <version>1.4.18</version>
         </dependency>
         <dependency>
             <groupId>javax.servlet.jsp</groupId>