diff --git a/documentation/pom.xml b/documentation/pom.xml
index 962cede9..d580ec37 100644
--- a/documentation/pom.xml
+++ b/documentation/pom.xml
@@ -133,7 +133,7 @@
         <dependency>
             <groupId>com.thoughtworks.xstream</groupId>
             <artifactId>xstream</artifactId>
-            <version>1.4.17</version>
+            <version>1.4.18</version>
             <scope>test</scope>
         </dependency>
         <dependency>