diff --git a/Lua-Plugins.md b/Lua-Plugins.md
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--- a/Lua-Plugins.md
+++ b/Lua-Plugins.md
@@ -1,5 +1,7 @@
 # LUA Plugin system
 
+**Note**: Plugins are a Liberation 2.2 feature, which is currently in preview. The features described on this page will not work with Liberation 2.1 or earlier.
+
 This plugin system was made for injecting LUA scripts in dcs-liberation missions.
 
 The resources for the plugins are stored in the `resources/plugins` folder ; each plugin has its own folder.