diff --git a/Makefile.PL b/Makefile.PL
index 4a461aa43..94ed1622e 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -39,6 +39,7 @@ requires(
 'Pod::POM' => 0, 
 'Plack'    => 0,
 'Plack::App::Cascade' => 0,
+'Plack::App::File' => 0,
 'Plack::Builder' => 0,
 'Plack::Middleware::Session::Cookie' => 0,
 'Plack::Request' => 0,