diff --git a/pom.xml b/pom.xml
index 78ffa35993..ec97cb1d5b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -179,7 +179,7 @@
       <dependency>
         <groupId>com.thoughtworks.xstream</groupId>
         <artifactId>xstream</artifactId>
-        <version>1.3.1</version>
+        <version>1.4.21</version>
       </dependency>
     </dependencies>
   </dependencyManagement>