diff --git a/histomicstk/__init__.py b/histomicstk/__init__.py
index 3745ec499..acb8d2073 100644
--- a/histomicstk/__init__.py
+++ b/histomicstk/__init__.py
@@ -1,15 +1,12 @@
 # import sub-packages to support nested calls
+from importlib.metadata import PackageNotFoundError
+from importlib.metadata import version as _importlib_version
+
 from . import segmentation  # must be imported before features
 from . import utils  # must be imported before other packages
 from . import (annotations_and_masks, features, filters, preprocessing,
                saliency, workflows)
 
-try:
-    from importlib.metadata import PackageNotFoundError
-    from importlib.metadata import version as _importlib_version
-except ImportError:
-    from importlib_metadata import PackageNotFoundError
-    from importlib_metadata import version as _importlib_version
 try:
     __version__ = _importlib_version(__name__)
 except PackageNotFoundError:
diff --git a/histomicstk/cli/__main__.py b/histomicstk/cli/__main__.py
index 054666ceb..6e408d8c2 100644
--- a/histomicstk/cli/__main__.py
+++ b/histomicstk/cli/__main__.py
@@ -1,7 +1,7 @@
 import os
 
-from slicer_cli_web import ctk_cli_adjustment  # noqa
 import slicer_cli_web.cli_list_entrypoint  # noqa I001
+from slicer_cli_web import ctk_cli_adjustment  # noqa
 
 
 def main():
diff --git a/ruff.toml b/ruff.toml
index 77589cf23..024a308fb 100644
--- a/ruff.toml
+++ b/ruff.toml
@@ -4,7 +4,7 @@ exclude = [
     "*/web_client/*",
     "*/*egg*/*",
 ]
-ignore = [
+lint.ignore = [
     "B017",
     "B026",
     "B904",
@@ -34,7 +34,7 @@ ignore = [
     "PT017",
 ]
 line-length = 100
-select = [
+lint.select = [
     "B",  # bugbear
     "C90",  # mccabe
     "D",  # pydocstyle
@@ -57,8 +57,8 @@ select = [
     "RSE",
 ]
 
-[flake8-quotes]
+[lint.flake8-quotes]
 inline-quotes = "single"
 
-[mccabe]
+[lint.mccabe]
 max-complexity = 14