diff --git a/src/PHP/ComposerRequire.php b/src/PHP/ComposerRequire.php
index 787191b..6402353 100644
--- a/src/PHP/ComposerRequire.php
+++ b/src/PHP/ComposerRequire.php
@@ -19,7 +19,7 @@ public function __toString()
     {
         return (string) new Dockerfile\Run(sprintf(<<<RUN
             set -ex \\
-                && composer require --prefer-dist --no-progress --prefer-stable --sort-packages --optimize-autoloader %s
+                && composer require --prefer-dist --no-progress --prefer-stable --sort-packages --optimize-autoloader --with-dependencies %s
             RUN, implode(' ', $this->packages)));
     }
 }