diff --git a/.github/workflows/basictest.yml b/.github/workflows/basictest.yml
index 954d264..5867ff6 100644
--- a/.github/workflows/basictest.yml
+++ b/.github/workflows/basictest.yml
@@ -36,7 +36,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         path: src
 
diff --git a/.github/workflows/condatest.yml b/.github/workflows/condatest.yml
index c44ef0b..b7b7af3 100644
--- a/.github/workflows/condatest.yml
+++ b/.github/workflows/condatest.yml
@@ -17,7 +17,7 @@ jobs:
 
     steps:
     - name: Checkout main repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Setup conda environment
       uses: conda-incubator/setup-miniconda@v3
diff --git a/.github/workflows/publish-doc.yml b/.github/workflows/publish-doc.yml
index 76357e4..d24c72d 100644
--- a/.github/workflows/publish-doc.yml
+++ b/.github/workflows/publish-doc.yml
@@ -38,7 +38,7 @@ jobs:
 
     steps:
     - name: Checkout main repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       #Note: We get all history and tags, so the version detection will always
       #be able to yield vx.y.z for the main website:
       with:
diff --git a/.github/workflows/pypi.yml b/.github/workflows/pypi.yml
index 12e1b76..dea4913 100644
--- a/.github/workflows/pypi.yml
+++ b/.github/workflows/pypi.yml
@@ -12,7 +12,7 @@ jobs:
       id-token: write # IMPORTANT: this permission is mandatory for trusted publishing
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Build distribution
         run: |
diff --git a/.github/workflows/test-doc.yml b/.github/workflows/test-doc.yml
index ea2b945..4dcd8e6 100644
--- a/.github/workflows/test-doc.yml
+++ b/.github/workflows/test-doc.yml
@@ -14,7 +14,7 @@ jobs:
 
     steps:
     - name: Checkout main repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Setup conda environment
       uses: conda-incubator/setup-miniconda@v3
diff --git a/.github/workflows/testshells.yml b/.github/workflows/testshells.yml
index 9614c16..010e5ed 100644
--- a/.github/workflows/testshells.yml
+++ b/.github/workflows/testshells.yml
@@ -39,7 +39,7 @@ jobs:
            zsh --version
 
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         path: src