diff --git a/README.md b/README.md
index c1fe537..a8e9769 100644
--- a/README.md
+++ b/README.md
@@ -77,11 +77,16 @@ ETA: 2030...to remove ALL, ASCII and unicode on a self hosted platform.
 
 ## Maven Use
 
+Notes on JDK version:
+- jdk-21.0.2 and lower work
+- jdk-22.0.2 FAIL: Can't compile JPP
+- jdk-23.0.1 FAIL: Does compile JPP but can't find import in java3c
+
 Make package jar's
 - mvn clean package
 - result: nx01-jpp-base/target/nx01-jpp-base-〇一。壬寅。一〄-SNAPSHOT.jar (19MB)
 
-Run javadoc (with markdown requires java 17 or lower for compile and java 23 for javadoc ;-)
+Run javadoc (markdown requires java 23 and compile needs java 21 or lower)
 - JAVA_HOME=/usr/lib/jvm/jdk-17.0.7+7/ mvn clean compile
 - JAVA_HOME=/usr/lib/jvm/jdk-23.0.1/ mvn javadoc:aggregate
 - result: target/site/apidocs (613MB)