diff --git a/README.md b/README.md
index ab112fcf7d9..2c54109d721 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ Any contributions are welcome.
 
 ### Building
 
-PHPStan's source code is developed on PHP 8.0. For distribution in `phpstan/phpstan` package and as a PHAR file, the source code is transformed to run on PHP 7.2 and higher.
+PHPStan's source code is developed on PHP 8.1. For distribution in `phpstan/phpstan` package and as a PHAR file, the source code is transformed to run on PHP 7.2 and higher.
 
 Initially you need to run `composer install` in case you aren't working in a directory which was built before.