diff --git a/README.md b/README.md
index 98e4c64..22d29a7 100644
--- a/README.md
+++ b/README.md
@@ -287,10 +287,14 @@ section *Select Qt module for WebView*).
 To build the plugin for Dolphin integration KIO is also required. Additionally, the Dolphin plugin requires
 Qt 5.8 or newer. To skip building the plugin, add `-DNO_FILE_ITEM_ACTION_PLUGIN:BOOL=ON` to the CMake arguments.
 
-To build the Plasmoid for the Plasma 5 desktop, the Qt module QML and the KF5 module Plasma are required as
-well. Additionally, the Plasmoid requires Qt 5.12 or newer. To skip building the Plasmoid, add
+To build the Plasmoid for the Plasma desktop, the Qt module QML and the KDE Frameworks module Plasma are
+required as well. Additionally, the Plasmoid requires Qt 5.15 or newer. To skip building the Plasmoid, add
 `-DNO_PLASMOID:BOOL=ON` to the CMake arguments.
 
+To specify the major Qt version to use, set `QT_PACKAGE_PREFIX` (e.g. add `-DQT_PACKAGE_PREFIX:STRING=Qt6`
+to the CMake arguments). There's also `KF_PACKAGE_PREFIX` for KDE dependencies. Note that KDE integrations
+always require the same major Qt version as your KDE installation uses.
+
 ---
 
 The following Boost libraries are required: `Boost.Asio`, `Boost.Process`, `Boost.Filesystem`