@@ -2,6 +2,9 @@
 # vi: set ft=python sts=4 ts=4 sw=4 et:
 """Settings for sphinxext.interfaces and connection to sphinx-apidoc."""
 import re
+from packaging.version import Version
+
+import sphinx
 from sphinx.ext.napoleon import (
 Config as NapoleonConfig,
 __python_domain,
@@ -39,13 +42,24 @@ class Config(NapoleonConfig):
 
 """
 
-_config_values = {
-"nipype_skip_classes": (
-["Tester", "InputSpec", "OutputSpec", "Numpy", "NipypeTester"],
-"env",
-),
-**NapoleonConfig._config_values,
-}
+if Version(sphinx.__version__) >= Version("8.2.1"):
+_config_values = (
+(
+"nipype_skip_classes",
+["Tester", "InputSpec", "OutputSpec", "Numpy", "NipypeTester"],
+"env",
+frozenset({list[str]}),
+),
+*NapoleonConfig._config_values,
+)
+else:
+_config_values = {
+"nipype_skip_classes": (
+["Tester", "InputSpec", "OutputSpec", "Numpy", "NipypeTester"],
+"env",
+),
+**NapoleonConfig._config_values,
+}
 
 
 def setup(app):
@@ -82,8 +96,12 @@ def setup(app):
 app.connect("autodoc-process-docstring", _process_docstring)
 app.connect("autodoc-skip-member", _skip_member)
 
-for name, (default, rebuild) in Config._config_values.items():
-app.add_config_value(name, default, rebuild)
+if Version(sphinx.__version__) >= Version("8.2.1"):
+for name, default, rebuild, types in Config._config_values:
+app.add_config_value(name, default, rebuild, types=types)
+else:
+for name, (default, rebuild) in Config._config_values.items():
+app.add_config_value(name, default, rebuild)
 return {"version": __version__, "parallel_read_safe": True}