diff --git a/dmn-core/pom.xml b/dmn-core/pom.xml
index 0e094a0dc..da8f6eb1d 100644
--- a/dmn-core/pom.xml
+++ b/dmn-core/pom.xml
@@ -146,7 +146,7 @@
         <dependency>
             <groupId>com.thoughtworks.xstream</groupId>
             <artifactId>xstream</artifactId>
-            <version>1.4.20</version>
+            <version>1.4.21</version>
         </dependency>
 
     </dependencies>