diff --git a/pitest/pom.xml b/pitest/pom.xml
index d6dc21abe..3ff8af162 100644
--- a/pitest/pom.xml
+++ b/pitest/pom.xml
@@ -244,7 +244,7 @@
 		<dependency>
 			<groupId>com.thoughtworks.xstream</groupId>
 			<artifactId>xstream</artifactId>
-            <version>1.4.17</version>
+            <version>1.4.18</version>
             <scope>test</scope>
 		</dependency>
 	</dependencies>