diff --git a/pom.xml b/pom.xml
index 15a4f4c..92e9222 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,7 +17,7 @@ See the Apache License Version 2.0 for the specific language governing permissio
   <parent>
     <groupId>org.codehaus.plexus</groupId>
     <artifactId>plexus</artifactId>
-    <version>20</version>
+    <version>21</version>
   </parent>
 
   <artifactId>plexus-build-api</artifactId>