diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index 7b7dcaf..14dbae5 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -10,19 +10,18 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    # NB: v1.4.0 covers Python 3.8.
-    - uses: ricardochaves/python-lint@v1.4.0
+    - uses: actions/setup-python@v5
       with:
-        python-root-list: lddtree.py pylint
-        use-pylint: true
-        use-pycodestyle: false
-        use-flake8: false
-        use-black: true
-        use-mypy: true
-        use-isort: true
-        extra-pylint-options: ""
-        extra-pycodestyle-options: ""
-        extra-flake8-options: ""
-        extra-black-options: ""
-        extra-mypy-options: ""
-        extra-isort-options: ""
+        python-version: '3.x'
+    - name: install dependencies
+      run: |
+        python -m pip install pylint mypy black 'isort[colors]'
+        # mypy dependencies for following imported types
+        python -m pip install argcomplete
+    - run: pylint --output-format colorized lddtree.py
+    - run: mypy lddtree.py
+      env:
+        TERM: xterm-color
+        MYPY_FORCE_COLOR: 1
+    - run: black --check --diff --color lddtree.py
+    - run: isort --check --diff --color lddtree.py
diff --git a/lddtree.py b/lddtree.py
index 8ccd855..0782c1b 100755
--- a/lddtree.py
+++ b/lddtree.py
@@ -56,7 +56,7 @@
 # Disable import errors for all 3rd party modules.
 # pylint: disable=import-error
 try:
-    import argcomplete  # type: ignore
+    import argcomplete
 except ImportError:
     argcomplete = cast(Any, None)