diff --git a/README.md b/README.md
index 8fb9182..c48734b 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,11 @@ prestissimo (composer plugin)
 [![Total Downloads](https://poser.pugx.org/hirak/prestissimo/downloads)](https://packagist.org/packages/hirak/prestissimo)
 [![License](https://poser.pugx.org/hirak/prestissimo/license)](https://packagist.org/packages/hirak/prestissimo)  
 
-This is a [composer](https://getcomposer.org) plugin that downloads packages in parallel to speed up the installation process. 
+This is a [composer 1.x](https://getcomposer.org) plugin that downloads packages in parallel to speed up the installation process. 
+
+## Announcement: [Composer 2 is now available!](https://blog.packagist.com/composer-2-0-is-now-available/)
+
+**This plugin is for Composer1; Composer2 is very fast on its own. Uninstall this plugin and update the Composer itself.**
 
 
 ## Requirements
diff --git a/composer.json b/composer.json
index 273460b..21691e1 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
     "name": "hirak/prestissimo",
-    "description": "composer parallel install plugin",
+    "description": "composer parallel install plugin for Composer 1.x",
     "type": "composer-plugin",
     "keywords": ["parallel", "install", "speedup"],
     "authors": [