diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 0955b32..59953b0 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,7 +12,7 @@ jobs:
       - name: Python dependencies
         run: python -m pip install git-archive-all
       - name: Clone
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
            submodules: recursive
       - name: Archive code including submodules
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 6826867..1b5cf15 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,7 +12,7 @@ jobs:
         shell: bash -el {0}
     steps:
       - name: Clone repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           submodules: recursive
       - uses: conda-incubator/setup-miniconda@v3
@@ -28,7 +28,7 @@ jobs:
       - name: Test import
         run: python -c "import pygotm"
       - name: Clone gotm cases
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: gotm-model/cases
           path: cases