diff --git a/setup.py b/setup.py
index cf73173..281d7be 100644
--- a/setup.py
+++ b/setup.py
@@ -38,6 +38,11 @@ setup(
     long_description=LONG_DESCRIPTION,
     packages=[
         "pycen",
+        "pycen.pers",
+        "pycen.ref",
+        "pycen.sites",
+        "pycen.vrac",
+        "pycen.wfs",
     ],
     package_data={"pycen": data_files},
     python_requires=">=3.7",