diff --git a/README.md b/README.md
index 59baf96..c5569ce 100644
--- a/README.md
+++ b/README.md
@@ -11,5 +11,5 @@ composer require rmphp/kernel
 ```
 
 ```bash
-composer require rmphp/kernel:"^3.1"
+composer require rmphp/kernel:"^4.1"
 ```