Use new oss-parent 9
diff --git a/pom.xml b/pom.xml
index bb27182..6704fd3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -25,7 +25,7 @@
   <parent>
     <groupId>org.sonatype.oss</groupId>
     <artifactId>oss-parent</artifactId>
-    <version>7</version>
+    <version>9</version>
   </parent>
 
   <dependencyManagement>