Downgrade to Plexus XML 3.0.0
diff --git a/pom.xml b/pom.xml
index 6eded50..91a4db6 100644
--- a/pom.xml
+++ b/pom.xml
@@ -263,6 +263,7 @@
     <dependency>
       <groupId>org.codehaus.plexus</groupId>
       <artifactId>plexus-xml</artifactId>
+      <version>3.0.0</version>
     </dependency>
     <dependency>
       <groupId>org.codehaus.plexus</groupId>