diff --git a/thucydides-core/pom.xml b/thucydides-core/pom.xml
index 85ba5017c..a48968a93 100644
--- a/thucydides-core/pom.xml
+++ b/thucydides-core/pom.xml
@@ -171,7 +171,7 @@
         <dependency>
             <groupId>com.thoughtworks.xstream</groupId>
             <artifactId>xstream</artifactId>
-            <version>1.4.1</version>
+            <version>1.4.19</version>
         </dependency>
         <dependency>
             <groupId>net.thucydides</groupId>