diff --git a/pom.xml b/pom.xml
index 4b0714b..4509b9b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -107,7 +107,7 @@
       <dependency>
         <groupId>com.thoughtworks.xstream</groupId>
         <artifactId>xstream</artifactId>
-        <version>1.4.19</version>
+        <version>1.4.20</version>
       </dependency>
 
       <!-- Test framework -->