diff --git a/README.md b/README.md
index a746821..930d6db 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,10 @@ A common connection pool based on Swoole is usually used as the database connect
 > Install package via [Composer](https://getcomposer.org/).
 
 ```shell
+# PHP 7.x
 composer require "open-smf/connection-pool:~1.0"
+# PHP 8.x
+composer require "open-smf/connection-pool:~2.0"
 ```
 
 ## Usage
@@ -220,4 +223,4 @@ $server->start();
 
 ## License
 
-[MIT](LICENSE)
\ No newline at end of file
+[MIT](LICENSE)