diff --git a/setup.cfg b/setup.cfg
index 9b4afdf5..591c4787 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -20,7 +20,8 @@ classifiers      =
 
 [options]
 py_modules = jupyter
-packages = jupyter_core, jupyter_core.utils, jupyter_core.tests
+packages = find_namespace:
+    jupyter_core
 include_package_data = True
 python_requires = >=3.6
 install_requires =