diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e6aaec8..cf99511 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,22 +19,23 @@ jobs:
         os: ["ubuntu-latest"]
         python-version: ["3.8", "3.9", "3.10", "3.11"]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Cache conda
-        uses: actions/cache@v1
+        uses: actions/cache@v4
         env:
           # Increase this value to reset cache if ci/environment.yml has not changed
           CACHE_NUMBER: 0
         with:
           path: ~/conda_pkgs_dir
           key: ${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-${{ hashFiles('ci/environment.yml') }}
-      - uses: conda-incubator/setup-miniconda@v2
+      - uses: conda-incubator/setup-miniconda@v3
         with:
           activate-environment: test_env_glidertools # Defined in ci/environment*.yml
           auto-update-conda: false
           python-version: ${{ matrix.python-version }}
           environment-file: ci/environment.yml
           use-only-tar-bz2: true # IMPORTANT: This needs to be set for caching to work properly!
+          conda-remove-defaults: "true"
       - name: Set up conda environment
         shell: bash -l {0}
         run: |
@@ -45,7 +46,7 @@ jobs:
         run: |
           pytest -n auto --cov=./ --cov-report=xml
       - name: Upload code coverage to Codecov
-        uses: codecov/codecov-action@v1
+        uses: codecov/codecov-action@v4
         with:
           file: ./coverage.xml
           flags: unittests
diff --git a/.github/workflows/linting.yml b/.github/workflows/linting.yml
index f9a5ba7..f825ee6 100644
--- a/.github/workflows/linting.yml
+++ b/.github/workflows/linting.yml
@@ -9,10 +9,10 @@ jobs:
         runs-on: ubuntu-latest
         steps:
             - name: checkout
-              uses: actions/checkout@v2
+              uses: actions/checkout@v4
             - name: set up python
-              uses: actions/setup-python@v2
+              uses: actions/setup-python@v5
               with:
-                  python-version: 3.8
+                  python-version: "3.11"
             - name: Run pre-commit
-              uses: pre-commit/action@v2.0.0
+              uses: pre-commit/action@v3.0.1
diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index 9f6984f..2bbf3ad 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -9,9 +9,9 @@ jobs:
     if: github.repository == 'GliderToolsCommunity/GliderTools'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v4
       - name: Set up Python
-        uses: actions/setup-python@v1
+        uses: actions/setup-python@v5
         with:
           python-version: '3.x'
       - name: Check git status
@@ -31,7 +31,7 @@ jobs:
         run: |
           python -m twine check dist/*
       - name: Publish package to PyPI
-        uses: pypa/gh-action-pypi-publish@v1.4.2
+        uses: pypa/gh-action-pypi-publish@release/v1
         with:
           user: __token__
           password: ${{ secrets.PYPI_TOKEN }}
diff --git a/tests/test_optics.py b/tests/test_optics.py
index ed9a930..16778e1 100644
--- a/tests/test_optics.py
+++ b/tests/test_optics.py
@@ -21,7 +21,12 @@ def test_sunrise_sunset():
     ]
     lat = -35, 45, 80
     lon = 0, 0, 0
-    sunrise, sunset = sunset_sunrise(time, lat, lon)
+    try:
+        sunrise, sunset = sunset_sunrise(time, lat, lon)
+    except (OSError, ImportError) as e:
+        pytest.skip(
+            f"Skipping test because skyfield could not download ephemeris data: {e}"
+        )
 
     # Three entries, there should be three outputs
     assert len(sunrise) == len(lat)