diff --git a/src/Captain.php b/src/Captain.php
index 4922332..e24a70d 100644
--- a/src/Captain.php
+++ b/src/Captain.php
@@ -67,7 +67,9 @@ public function execute(string $command, IOInterface $io)
         $executable     = str_replace(' ', '\\ ', $this->executable);
 
         // sub process settings
-        $cmd   = $executable . ' ' . $command . $ansi . $interaction . $skip . $configuration . $repository;
+        $cmd   = PHP_BINARY . ' ' . $executable . ' ' . $command
+               . $ansi . $interaction . $skip
+               . $configuration . $repository;
         $pipes = [];
         $spec  = [
             0 => ['file', 'php://stdin', 'r'],