diff --git a/src/Composer.php b/src/Composer.php
index b477c36..ff5c0dd 100644
--- a/src/Composer.php
+++ b/src/Composer.php
@@ -6,9 +6,20 @@ class Composer extends \Illuminate\Support\Composer
 {
     public function installDryRun(string $options = null)
     {
-        $process = $this->getProcess();
+        $composer = $this->findComposer();
 
-        $process->setCommandLine(trim($this->findComposer().' install --dry-run '.$options));
+        $command = array_merge(
+            (array) $composer,
+            ['install', '--dry-run'],
+            array_filter(array_map('trim', explode(' ', $options)))
+        );
+
+        if (is_array($composer)) {
+            $process = $this->getProcess($command);
+        } else {
+            $process = $this->getProcess();
+            $process->setCommandLine(trim(implode(' ', $command)));
+        }
 
         $process->run();