diff --git a/src/Oro/Bundle/InstallerBundle/Composer/ScriptHandler.php b/src/Oro/Bundle/InstallerBundle/Composer/ScriptHandler.php
index 27e22e76205..ac7d77cc4eb 100644
--- a/src/Oro/Bundle/InstallerBundle/Composer/ScriptHandler.php
+++ b/src/Oro/Bundle/InstallerBundle/Composer/ScriptHandler.php
@@ -327,7 +327,7 @@ private static function pnpmInstall(
         }
     }
 
-    private static function runProcess(IOInterface $inputOutput, array $cmd, int $timeout, string $cwd = null): int
+    private static function runProcess(IOInterface $inputOutput, array $cmd, int $timeout, ?string $cwd = null): int
     {
         $inputOutput->write(implode(' ', $cmd));