diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 49bcd0d..552b338 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -29,10 +29,9 @@ jobs:
         run: c2cciutils-checks
 
       - run: pipenv sync --system --dev
-      - run: python3 -m pip install --quiet --user -e .
-      - run: prospector .
+      - run: pipenv run prospector .
       - run: >
-          coverage run --source=deskew --module pytest --durations=0 --verbose --color=yes
+          pipenv run coverage run --source=deskew --module pytest --durations=0 --verbose --color=yes
           --profile --profile-svg --junitxml=results/test-reports/junit.xml tests &&
           coverage report &&
           coverage html --directory=results/coverage
diff --git a/setup.cfg b/setup.cfg
index 12f7883..10c29f9 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -5,6 +5,10 @@ ignore = E722
 [mypy]
 python_version = 3.8
 ignore_missing_imports = True
+warn_redundant_casts = True
+warn_unused_ignores = True
+warn_return_any = True
+strict = True
 
 [bdist_wheel]
 universal = 1