diff --git a/pom.xml b/pom.xml
index 0987297..9d80c29 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>org.codehaus.plexus</groupId>
     <artifactId>plexus</artifactId>
-    <version>20</version>
+    <version>21</version>
     <relativePath />
   </parent>