diff --git a/doc/get-qt6.md b/doc/get-qt6.md
index fb28bd5..87c4510 100644
--- a/doc/get-qt6.md
+++ b/doc/get-qt6.md
@@ -1,4 +1,4 @@
-[https://www.qt.io/download](qt.io/download)
+[qt.io/download](https://www.qt.io/download)
 
 * Downloads for open source users
 * Go open source
diff --git a/examples/9999/qml/main.qml b/examples/9999/qml/main.qml
index 686eb65..0bd07fd 100644
--- a/examples/9999/qml/main.qml
+++ b/examples/9999/qml/main.qml
@@ -1,5 +1,5 @@
-import QtQuick 2.13
-import QtQuick.Controls 2.13
+import QtQuick 2.15
+import QtQuick.Controls 2.15
 import Lisp 1.0
 
 Rectangle {
diff --git a/readme.md b/readme.md
index c6ad016..2c7b28d 100644
--- a/readme.md
+++ b/readme.md
@@ -19,6 +19,14 @@ ECL and Qt5/Qt6 are LGPL.
 LQML can be considered public domain.
 
 
+Tested
+------
+
+Only tested with **Qt5.15** and latest **Qt6**. It's recommended to use the new
+Qt online installer (see [doc/get-qt6](doc/get-qt6.md)), where you can choose
+to install different Qt versions side by side, sharing the same Qt Creator.
+
+
 TODO
 ----