diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 256196e..d72244e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,14 +16,14 @@ jobs:
       - name: Set up Python 3.11
         uses: actions/setup-python@v4
         with:
-          python-version: 3.11
+          python-version: "3.11"
       - uses: pre-commit/action@v3.0.1
 
   tests:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.9, 3.10, 3.11, 3.12]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}
@@ -40,7 +40,7 @@ jobs:
       - name: Create cov
         run: coverage xml
       - name: Upload to Codecov
-        if: matrix.python-version == 3.11
+        if: matrix.python-version == "3.11"
         uses: codecov/codecov-action@v4
         with:
           name: sphinx-exercise-pytest-py3.11
@@ -56,7 +56,7 @@ jobs:
       - name: Set up Python 3.11
         uses: actions/setup-python@v4
         with:
-          python-version: 3.11
+          python-version: "3.11"
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
@@ -74,11 +74,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout source
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up Python 3.11
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v4
         with:
-          python-version: 3.11
+          python-version: "3.11"
       - name: Build package
         run: |
           pip install wheel build
diff --git a/pyproject.toml b/pyproject.toml
index c61b66a..6ef29de 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -72,4 +72,3 @@ Tracker = "https://github.com/executablebooks/sphinx-exercise/issues"
 
 [tool.hatch.version]
 path = "sphinx_exercise/__init__.py"
-