diff --git a/tests/pom.xml b/tests/pom.xml
index 3813f7d7..689a71b3 100644
--- a/tests/pom.xml
+++ b/tests/pom.xml
@@ -120,7 +120,7 @@
         <dependency>
             <groupId>com.thoughtworks.xstream</groupId>
             <artifactId>xstream</artifactId>
-            <version>1.4.17</version>
+            <version>1.4.18</version>
             <scope>test</scope>
         </dependency>
         <dependency>