diff --git a/pom.xml b/pom.xml
index 92cc11ddfb..201e77af71 100644
--- a/pom.xml
+++ b/pom.xml
@@ -85,7 +85,7 @@
             <name>The Apache Software License, Version 2.0</name>
             <url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
             <distribution>repo</distribution>
-            <comments />
+            <comments/>
         </license>
     </licenses>
 
@@ -397,7 +397,7 @@
                             <id>enforce</id>
                             <configuration>
                                 <rules>
-                                    <dependencyConvergence />
+                                    <dependencyConvergence/>
                                 </rules>
                             </configuration>
                             <goals>
@@ -1099,7 +1099,7 @@
             <dependency>
                 <groupId>com.thoughtworks.xstream</groupId>
                 <artifactId>xstream</artifactId>
-                <version>1.4.11.1</version>
+                <version>1.4.20</version>
             </dependency>
 
             <dependency>