diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..35ce0b3
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,30 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+  workflow_dispatch:
+
+jobs:
+  lint:
+    name: lint and style checks
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.12"
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install black black[jupyter] ruff
+      - name: Black style check
+        run: |
+          black --check .
+      - name: Lint with ruff
+        run: |
+          ruff check .
\ No newline at end of file
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 6903ecf..7b6e244 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -8,7 +8,7 @@ version: 2
 build:
   os: ubuntu-24.04
   tools:
-    python: "3.13"
+    python: "3.12"
 
 # Build documentation in the "docs/" directory with Sphinx
 sphinx:
diff --git a/Examples/TEST_Notebook.ipynb b/Examples/TEST_Notebook.ipynb
index 4159a99..6ef4a88 100644
--- a/Examples/TEST_Notebook.ipynb
+++ b/Examples/TEST_Notebook.ipynb
@@ -30,7 +30,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "ls $input_folder"
+    "!ls $input_folder"
    ]
   },
   {
@@ -57,7 +57,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "ls -lth $output_folder"
+    "!ls -lth $output_folder"
    ]
   },
   {
@@ -108,7 +108,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "ls $input_folder"
+    "!ls $input_folder"
    ]
   },
   {
@@ -136,7 +136,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "ls $output_folder"
+    "!ls $output_folder"
    ]
   },
   {
diff --git a/docs/notebooks/tutorial.ipynb b/docs/notebooks/tutorial.ipynb
index ff64b56..04a3daf 100644
--- a/docs/notebooks/tutorial.ipynb
+++ b/docs/notebooks/tutorial.ipynb
@@ -18,10 +18,12 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "import pyscancf as pcf\n",
-    "import pyart\n",
     "import glob\n",
     "\n",
+    "import pyart\n",
+    "\n",
+    "import pyscancf as pcf\n",
+    "\n",
     "print(pcf.__version__)"
    ]
   },
diff --git a/pyproject.toml b/pyproject.toml
index ef24d83..766b39e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -85,11 +85,6 @@ line-length = 88
 [tool.ruff]
 target-version = "py39"
 builtins = ["ellipsis"]
-exclude = [".eggs", "doc"]
-
-[tool.ruff.lint]
-ignore = ["E402", "E501", "E731"]
+exclude = [".eggs", "doc", "Examples", "docs/_build"]
 select = ["F", "E", "W", "I", "UP"]
-
-[tool.ruff.lint.isort]
-known-first-party = ["pyscancf"]
+ignore = ["E402", "E501", "E731"]