diff --git a/pom.xml b/pom.xml
index 34617ccc..5037add0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -138,7 +138,7 @@
     <dependency>
       <groupId>com.thoughtworks.xstream</groupId>
       <artifactId>xstream</artifactId>
-      <version>1.4.10</version>
+      <version>1.4.21</version>
       <exclusions>
         <!-- we use stax -->
         <exclusion>