diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 4164f2d..60822c9 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -21,50 +21,50 @@ jobs:
 
     services:
       postgres:
-        image: postgres:14.0
+        image: postgres:16.0
         env:
           POSTGRES_DB: github_actions
           POSTGRES_USER: postgres
           POSTGRES_PASSWORD: postgres
         ports:
           - 5432:5432
-        # needed because the postgres container does not provide a healthcheck
         options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
 
     steps:
       - name: Check out repository code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - name: Setup Python 3.10
-        uses: actions/setup-python@v2
+      - name: Setup Python 3.12
+        uses: actions/setup-python@v4
         with:
-          python-version: "3.10"
+          python-version: "3.12"
 
       - name: Install psycopg prerequisites
-        run: sudo apt-get install libpq-dev
+        run: |
+          sudo apt-get install libpq-dev
 
-      - name: Install pipenv
+      - name: Install poetry
         run: |
-          python -m pip install --upgrade pipenv wheel
+          python -m pip install --upgrade poetry wheel
 
-      - id: cache-pipenv
-        uses: actions/cache@v1
+      - id: cache-poetry
+        uses: actions/cache@v4
         with:
           path: ~/.local/share/virtualenvs
-          key: ${{ runner.os }}-pipenv-${{ hashFiles('**/Pipfile.lock') }}
+          key: ${{ runner.os }}-poetry-${{ hashFiles('**/poetry.lock') }}
 
       - name: Install dependencies
-        if: steps.cache-pipenv.outputs.cache-hit != 'true'
+        if: steps.cache-poetry.outputs.cache-hit != 'true'
         run: |
-          pipenv sync --dev --python 3.10 --verbose
+          poetry install
 
       - name: Django tests
         run: |
-          pipenv run coverage run manage.py test
+          poetry run coverage run manage.py test
 
       - name: Code coverage
         run: |
-          pipenv run coverage report -m
+          poetry run coverage report -m
 
   test-frontend:
     runs-on: ubuntu-latest