diff --git a/setup.cfg b/setup.cfg
index cdde703..9c0374b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -24,9 +24,7 @@ classifiers =
     Topic :: Internet :: WWW/HTTP
 
 [options]
-package_dir =
-    twisted=daphne/twisted
-packages = find:
+packages = find_namespace:
 include_package_data = True
 install_requires =
     asgiref>=3.5.2,<4
@@ -48,6 +46,11 @@ tests =
     pytest
     pytest-asyncio
 
+[options.packages.find]
+include=
+    daphne.*
+    twisted.*
+
 [flake8]
 exclude = venv/*,tox/*,docs/*,testproject/*,js_client/*,.eggs/*
 extend-ignore = E123, E128, E266, E402, W503, E731, W601
diff --git a/daphne/twisted/plugins/fd_endpoint.py b/twisted/plugins/fd_endpoint.py
similarity index 100%
rename from daphne/twisted/plugins/fd_endpoint.py
rename to twisted/plugins/fd_endpoint.py