diff --git a/docs/source/conf.py b/docs/source/conf.py
index 9219f72c3..64fbf4846 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -43,10 +43,27 @@
     'glossary_warnings',
     'sphinx_copybutton', 'sphinx.ext.autodoc',
     'sphinx.ext.autosummary', 'sphinx.ext.mathjax',
+    'sphinx.ext.napoleon',  # Support NumPy and Google style docstrings
     'sphinx_remove_toctrees',
     'chemrole',
 ]
 
+# Napoleon settings for NumPy-style docstrings
+napoleon_google_docstring = True
+napoleon_numpy_docstring = True
+napoleon_include_init_with_doc = False
+napoleon_include_private_with_doc = False
+napoleon_include_special_with_doc = True
+napoleon_use_admonition_for_examples = False
+napoleon_use_admonition_for_notes = False
+napoleon_use_admonition_for_references = False
+napoleon_use_ivar = False
+napoleon_use_param = True
+napoleon_use_rtype = True
+napoleon_preprocess_types = False
+napoleon_type_aliases = None
+napoleon_attr_annotations = True
+
 ## warn about invalid references (e.g. invalid class names)
 nitpicky = True              
 nitpick_ignore = []