diff --git a/.flake8 b/.flake8
deleted file mode 100644
index 3dff26a..0000000
--- a/.flake8
+++ /dev/null
@@ -1,5 +0,0 @@
-[flake8]
-per-file-ignores =
-    src/pycmx/__init__.py: F401
-    tests/__init__.py: F401
-    
diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index f381ab5..fe67725 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -26,10 +26,9 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        python -m pip install -e .[dev]
+        python -m pip install --group dev -e .
     - name: Lint with flake8
       run: |
-        # stop the build if there are Python syntax errors or undefined names
         ruff check src/
     - name: Test with pytest
       run: |
diff --git a/pyproject.toml b/pyproject.toml
index 389f4e5..f3b5a7c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,10 +29,11 @@ classifiers = [
 [project.optional-dependencies]
 doc = [
   'sphinx >= 5.3.0',
-  'sphinx_rtd_theme >= 1.1.1'
+  'sphinx_rtd_theme >= 1.1.1',
 ]
 dev = [
   'pytest',
+  'ruff>=0.14.10'
 ]
 
 [project.urls]
@@ -42,9 +43,7 @@ Repository = "https://github.com/iluvcapra/pycmx.git"
 Tracker = "https://github.com/iluvcapra/pycmx/issues" 
 
 [dependency-groups]
-dev = [
-    "ruff>=0.14.10",
-]
+dev = ['ruff']
 doc = ['sphinx', 'sphinx_rtd_theme']