diff --git a/taverna-tavlang-tool/pom.xml b/taverna-tavlang-tool/pom.xml
index 21c9520..ec81793 100644
--- a/taverna-tavlang-tool/pom.xml
+++ b/taverna-tavlang-tool/pom.xml
@@ -75,7 +75,7 @@
     <dependency>
       <groupId>com.thoughtworks.xstream</groupId>
       <artifactId>xstream</artifactId>
-      <version>1.4.8</version>
+      <version>1.4.19</version>
     </dependency>