diff --git a/.github/workflows/ci-additional.yml b/.github/workflows/ci-additional.yml
index c3886e2e..65f096e7 100644
--- a/.github/workflows/ci-additional.yml
+++ b/.github/workflows/ci-additional.yml
@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: checkout the repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           # need to fetch all tags to get a correct version
           fetch-depth: 0 # fetch all branches and tags
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d3bcae23..21437bbb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,7 +20,7 @@ jobs:
     outputs:
       triggered: ${{ steps.detect-trigger.outputs.trigger-found }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 2
       - uses: xarray-contrib/ci-trigger@v1
@@ -55,7 +55,7 @@ jobs:
 
     steps:
       - name: checkout the repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           # need to fetch all tags to get a correct version
           fetch-depth: 0 # fetch all branches and tags
diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index bcd20066..51d3bfe1 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -24,7 +24,7 @@ jobs:
     outputs:
       triggered: ${{ steps.detect-trigger.outputs.trigger-found }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 2
       - uses: xarray-contrib/ci-trigger@v1.2
@@ -57,7 +57,7 @@ jobs:
 
     steps:
       - name: checkout the repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           # need to fetch all tags to get a correct version
           fetch-depth: 0 # fetch all branches and tags
diff --git a/.github/workflows/pypi.yaml b/.github/workflows/pypi.yaml
index 584f63a7..2de974f6 100644
--- a/.github/workflows/pypi.yaml
+++ b/.github/workflows/pypi.yaml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.repository == 'xarray-contrib/pint-xarray'
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0