diff --git a/src/ProcessFactory.php b/src/ProcessFactory.php
index 7865f4b..46315e7 100644
--- a/src/ProcessFactory.php
+++ b/src/ProcessFactory.php
@@ -7,7 +7,7 @@
 
 class ProcessFactory implements ProcessFactoryInterface
 {
-    public function getProcess(array $commandline, $cwd = null, array $env = null, $input = null, $timeout = 60, array $options = null)
+    public function getProcess(array $command, ?string $cwd = null, ?array $env = null, $input = null, ?float $timeout = 60);
     {
         return new Process($commandline, $cwd, $env, $input, $timeout);
     }