diff --git a/docs/conf.py b/docs/conf.py
index d83387b..d3db897 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -45,7 +45,7 @@
 
 # General information about the project.
 project = "pybv"
-copyright = f"2018-{date.today().year}, pybv developers"
+copyright = f"2018-{date.today().year}, pybv developers"  # noqa:A001
 author = "pybv developers"
 version = pybv.__version__
 release = version
diff --git a/docs/sphinxext/gh_substitutions.py b/docs/sphinxext/gh_substitutions.py
index bc60766..02b0054 100644
--- a/docs/sphinxext/gh_substitutions.py
+++ b/docs/sphinxext/gh_substitutions.py
@@ -10,8 +10,12 @@
 from docutils.parsers.rst.roles import set_classes
 
 
-def gh_role(name, rawtext, text, lineno, inliner, options={}, content=[]):
+def gh_role(name, rawtext, text, lineno, inliner, options=None, content=None):
     """Link to a GitHub issue."""
+    if content is None:
+        content = []
+    if options is None:
+        options = {}
     try:
         # issue/PR mode (issues/PR-num will redirect to pull/PR-num)
         int(text)
diff --git a/pyproject.toml b/pyproject.toml
index 54c3ef2..3d4d4d8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,3 @@
-[tool.ruff]
-exclude = ["docs"]
-
 [tool.ruff.lint]
 select = ["A", "B006", "D", "E", "F", "I", "W", "UP"]
 ignore = ["A002", "D203", "D213"]