diff --git a/pom.xml b/pom.xml
index 1c8fab9..07b3409 100644
--- a/pom.xml
+++ b/pom.xml
@@ -20,7 +20,7 @@ limitations under the License.
   <parent>
     <groupId>org.codehaus.plexus</groupId>
     <artifactId>plexus</artifactId>
-    <version>20</version>
+    <version>21</version>
   </parent>
 
   <artifactId>plexus-xml</artifactId>