diff --git a/docs/conf.py b/docs/conf.py
index 5b13dbc6..881a0900 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -42,7 +42,7 @@
 
 
 def setup(app):
-    app.add_stylesheet("stsci.css")
+    app.add_css_file("stsci.css")
 
 conf.read([os.path.join(os.path.dirname(__file__), '..', 'setup.cfg')])
 setup_cfg = dict(conf.items('metadata'))
diff --git a/webbpsf/__init__.py b/webbpsf/__init__.py
index 5a0c580e..d30f339f 100644
--- a/webbpsf/__init__.py
+++ b/webbpsf/__init__.py
@@ -23,8 +23,6 @@
 except ImportError:
     __version__ = ''
 
-__all__ = ['__version__']
-
 __minimum_python_version__ = "3.6"