don't duplicate java.version
diff --git a/oak-parent/pom.xml b/oak-parent/pom.xml
index 5d95ab5..8fd2dc7 100644
--- a/oak-parent/pom.xml
+++ b/oak-parent/pom.xml
@@ -34,8 +34,8 @@
   <packaging>pom</packaging>
 
   <properties>
-    <minimalMavenBuildVersion>3.3.9</minimalMavenBuildVersion>
-    <maven.compiler.target>1.8</maven.compiler.target>
+    <minimalMavenBuildVersion>3.3.9</minimalMavenBuildVersion><!-- evaluated by ASF parent -->
+    <maven.compiler.target>${java.version}</maven.compiler.target><!-- evaluated by m-compiler-p and m-javadoc-p -->
     <test.opts.memory>-Xmx512m</test.opts.memory>
     <test.opts>${test.opts.coverage} ${test.opts.memory} -XX:+HeapDumpOnOutOfMemoryError -Dupdate.limit=100 -Djava.awt.headless=true</test.opts>
     <skip.deployment>false</skip.deployment>