diff --git a/src/Converter.php b/src/Converter.php
index 2b5a601..5774877 100644
--- a/src/Converter.php
+++ b/src/Converter.php
@@ -167,7 +167,7 @@ public function addOption($option)
      */
     protected function createProcess(/*string*/ $command)//: Process
     {
-        return new Process($command, $this->tempDir, $this->env);
+        return Process::fromShellCommandline($command, $this->tempDir, $this->env);
     }
 
     /**