diff --git a/pom.xml b/pom.xml
index bbdff2c..dd081a0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -22,7 +22,7 @@
 <dependency>
     <groupId>com.thoughtworks.xstream</groupId>
     <artifactId>xstream</artifactId>
-    <version>1.4.20</version>
+    <version>1.4.21</version>
 </dependency>
 
     </dependencies>