diff --git a/content/conf.py b/content/conf.py
index 58f8dbb8..8f9fbbc0 100644
--- a/content/conf.py
+++ b/content/conf.py
@@ -12,18 +12,19 @@
 #
 import os
 import sys
-sys.path.insert(0, os.path.abspath('.'))
+
+sys.path.insert(0, os.path.abspath("."))
 
 
 # -- Project information -----------------------------------------------------
 
 project = "Introduction to version control with Git"
-copyright = "CodeRefinery team"
-author = "CodeRefinery team"
+copyright = "CodeRefinery project"
+author = "CodeRefinery project"
 github_user = "coderefinery"
 github_repo_name = "git-intro"  # auto-detected from dirname if blank
 github_version = "main"
-conf_py_path = "/content/" # with leading and trailing slash
+conf_py_path = "/content/"  # with leading and trailing slash
 
 # -- General configuration ---------------------------------------------------
 
@@ -41,13 +42,13 @@
 
 # MyST extensions
 myst_enable_extensions = [
-    'colon_fence',   # ::: can be used instead of ``` for better rendering
-    ]
+    "colon_fence",  # ::: can be used instead of ``` for better rendering
+]
 # Settings for myst_nb:
 # https://myst-nb.readthedocs.io/en/latest/use/execute.html#triggering-notebook-execution
 nb_execution_mode = "cache"
 
-copybutton_exclude = '.linenos, .gp'
+copybutton_exclude = ".linenos, .gp"
 
 # Add any paths that contain templates here, relative to this directory.
 # templates_path = ['_templates']
@@ -77,7 +78,7 @@
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['css']
+html_static_path = ["css"]
 
 
 # HTML context:
@@ -94,10 +95,15 @@
 }
 
 import os
-if os.environ.get('GITHUB_REF', '') == 'refs/heads/main':
+
+if os.environ.get("GITHUB_REF", "") == "refs/heads/main":
     html_js_files = [
-        ('https://plausible.cs.aalto.fi/js/script.js', {"data-domain": "coderefinery.github.io", "defer": "defer"}),
+        (
+            "https://plausible.cs.aalto.fi/js/script.js",
+            {"data-domain": "coderefinery.github.io", "defer": "defer"},
+        ),
     ]
 
+
 def setup(app):
     app.add_css_file("style.css")