diff --git a/src/metapack/__init__.py b/src/metapack/__init__.py
index 10b7326..3b8177e 100644
--- a/src/metapack/__init__.py
+++ b/src/metapack/__init__.py
@@ -28,3 +28,4 @@
 set_default_cache_name('metapack')
 
 rowgenerators.appurl.url.default_downloader = Downloader.get_instance()
+