diff --git a/Build.PL b/Build.PL
index 961239562..03859b000 100644
--- a/Build.PL
+++ b/Build.PL
@@ -21,6 +21,10 @@ my $build = Module::Build->new(
     build_requires => {
         'Test::More' => '0.10',
     },
+    recommends     => {
+        'Growl::GNTP' => '0.15',
+        'Wx'          => '0.9901',
+    },
     script_files    => ['slic3r.pl'],
 );
 $build->dispatch('installdeps');