diff --git a/docs/source/conf.py b/docs/source/conf.py
index e41a0dc7d5cb207d71b82732b3df8a97b7206ccf..61cbab5843c6d23069fc9ca67df5d0fe87259e06 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -1,19 +1,19 @@
 import nifty8
 
-needs_sphinx = '3.2.0'
+needs_sphinx = "3.2.0"
 
 extensions = [
-    'sphinx.ext.napoleon',    # Support for NumPy and Google style docstrings
-    'sphinx.ext.mathjax',     # Render math as images
-    'sphinx.ext.viewcode',    # Add links to highlighted source code
-    'sphinx.ext.intersphinx', # Links to other sphinx docs (mostly numpy)
-    'sphinx.ext.autodoc',
-    'myst_parser',            # Parse markdown
-    'sphinxcontrib.bibtex',
-] 
+    "sphinx.ext.napoleon",  # Support for NumPy and Google style docstrings
+    "sphinx.ext.mathjax",  # Render math as images
+    "sphinx.ext.viewcode",  # Add links to highlighted source code
+    "sphinx.ext.intersphinx",  # Links to other sphinx docs (mostly numpy)
+    "sphinx.ext.autodoc",
+    "myst_parser",  # Parse markdown
+    "sphinxcontrib.bibtex",
+]
 
-bibtex_bibfiles = ['user/paper.bib']
-master_doc = 'index'
+bibtex_bibfiles = ["user/paper.bib"]
+master_doc = "index"
 
 myst_enable_extensions = [
     "amsmath",
@@ -22,13 +22,14 @@ myst_enable_extensions = [
     "tasklist",
 ]
 
-intersphinx_mapping = {"numpy": ("https://numpy.org/doc/stable/", None),
-                       #"matplotlib": ('https://matplotlib.org/stable/', None),
-                       "ducc0": ("https://mtr.pages.mpcdf.de/ducc/", None),
-                       "scipy": ('https://docs.scipy.org/doc/scipy/reference/', None),
-                       }
+intersphinx_mapping = {
+    "numpy": ("https://numpy.org/doc/stable/", None),
+    # "matplotlib": ('https://matplotlib.org/stable/', None),
+    "ducc0": ("https://mtr.pages.mpcdf.de/ducc/", None),
+    "scipy": ("https://docs.scipy.org/doc/scipy/reference/", None),
+}
 
-autodoc_default_options = {'special-members': '__init__'}
+autodoc_default_options = {"special-members": "__init__"}
 
 napoleon_google_docstring = False
 napoleon_numpy_docstring = True
@@ -41,9 +42,9 @@ napoleon_include_special_with_doc = True
 imgmath_embed = True
 numfig = True
 
-project = u'NIFTy8'
-copyright = u'2013-2022, Max-Planck-Society'
-author = u'Martin Reinecke'
+project = "NIFTy8"
+copyright = "2013-2022, Max-Planck-Society"
+author = "Martin Reinecke"
 
 version = nifty8.__version__[:-2]
 
@@ -53,12 +54,12 @@ add_module_names = False
 
 html_theme = "pydata_sphinx_theme"
 html_context = {"default_mode": "light"}
-html_logo = 'nifty_logo_black.png'
+html_logo = "nifty_logo_black.png"
 
 html_theme_options = {
     "logo": {
         "image_light": "nifty_logo_black.png",
-        "image_dark": "nifty_logo_black.png"
+        "image_dark": "nifty_logo_black.png",
     },
     "icon_links": [
         {
@@ -70,12 +71,12 @@ html_theme_options = {
             "name": "GitLab",
             "url": "https://gitlab.mpcdf.mpg.de/ift/nifty",
             "icon": "fab fa-gitlab",
-        }
+        },
     ],
     "navbar_persistent": ["search-field"],
     "navbar_end": ["navbar-icon-links"],
 }
 
-html_last_updated_fmt = '%b %d, %Y'
+html_last_updated_fmt = "%b %d, %Y"
 
-exclude_patterns = ['mod/modules.rst', 'mod/nifty8.logger.rst']
+exclude_patterns = ["mod/modules.rst", "mod/nifty8.logger.rst"]