diff --git a/.github/workflows/mdanalysis-compatibility.yaml b/.github/workflows/mdanalysis-compatibility.yaml
index bbe1863..1e8e874 100644
--- a/.github/workflows/mdanalysis-compatibility.yaml
+++ b/.github/workflows/mdanalysis-compatibility.yaml
@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6.0.0
diff --git a/.github/workflows/project-ci.yaml b/.github/workflows/project-ci.yaml
index b2cbd43..a0d11dd 100644
--- a/.github/workflows/project-ci.yaml
+++ b/.github/workflows/project-ci.yaml
@@ -18,7 +18,7 @@ jobs:
         python-version: ["3.11", "3.12", "3.13", "3.14"]
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v6.0.0
@@ -40,7 +40,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Python 3.14
         uses: actions/setup-python@v6.0.0
         with:
@@ -56,7 +56,7 @@ jobs:
     runs-on: ubuntu-24.04
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Set up Python 3.14
         uses: actions/setup-python@v6.0.0
         with:
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 06fa94e..e7a0d7c 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -18,7 +18,7 @@ jobs:
     steps:
     - name: Checkout repository
       id: repo
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Set up Python
       uses: actions/setup-python@v6.0.0
@@ -46,7 +46,7 @@ jobs:
     steps:
 
       - name: checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Change version in repo and CITATION.cff
         run: |
@@ -95,7 +95,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           ref: main
 
@@ -126,7 +126,7 @@ jobs:
     steps:
 
     - name: checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         ref: main
 
diff --git a/.github/workflows/renovate.yaml b/.github/workflows/renovate.yaml
index 9a89810..18f1a86 100644
--- a/.github/workflows/renovate.yaml
+++ b/.github/workflows/renovate.yaml
@@ -18,7 +18,7 @@ jobs:
       issues: write
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: renovatebot/github-action@v44.0.3
         with: