diff --git a/pom.xml b/pom.xml
index 50a11e4..ad71cb4 100644
--- a/pom.xml
+++ b/pom.xml
@@ -235,7 +235,7 @@
 		<dependency>
 			<groupId>com.thoughtworks.xstream</groupId>
 			<artifactId>xstream</artifactId>
-			<version>1.4.19</version>
+			<version>1.4.21</version>
 		</dependency>
 		<dependency>
 			<groupId>jfree</groupId>