diff --git a/src/Parts/Composer/Part.php b/src/Parts/Composer/Part.php
index 7774cd3..efc7a75 100644
--- a/src/Parts/Composer/Part.php
+++ b/src/Parts/Composer/Part.php
@@ -25,6 +25,7 @@ public function setupPackage($composer, Directory $target)
         );
 
         // Normalize and store the namespace
+        $namespace = str_replace('/', '\\', $namespace);
         $namespace = rtrim($namespace, '\\');
         @$composer->autoload->{'psr-4'}->{"$namespace\\"} = 'src/';