diff --git a/Pitest-1.5.2/pitest/pom.xml b/Pitest-1.5.2/pitest/pom.xml
old mode 100755
new mode 100644
index aa8d585..1c106c3
--- a/Pitest-1.5.2/pitest/pom.xml
+++ b/Pitest-1.5.2/pitest/pom.xml
@@ -249,7 +249,7 @@
 		<dependency>
 			<groupId>com.thoughtworks.xstream</groupId>
 			<artifactId>xstream</artifactId>
-            <version>1.4.8</version>
+            <version>1.4.19</version>
             <scope>test</scope>
 		</dependency>
 	</dependencies>