diff --git a/.github/workflows/draft-pdf.yml b/.github/workflows/draft-pdf.yml
index b7053c0..1856bd7 100644
--- a/.github/workflows/draft-pdf.yml
+++ b/.github/workflows/draft-pdf.yml
@@ -7,7 +7,7 @@ jobs:
     name: Paper Draft
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Build draft PDF
         uses: openjournals/openjournals-draft-action@master
         with:
diff --git a/.github/workflows/pre-commit.yml b/.github/workflows/pre-commit.yml
index 1354858..2923050 100644
--- a/.github/workflows/pre-commit.yml
+++ b/.github/workflows/pre-commit.yml
@@ -9,7 +9,7 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - uses: actions/setup-python@v5
       with:
         python-version: '3.10'
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index b366de4..b781417 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -10,7 +10,7 @@ jobs:
     env:
       PYPI_TOKEN:  ${{ secrets.PYPI_TOKEN }}
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: set up python
       uses: actions/setup-python@v5
       with:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 819a30e..7af0733 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -15,7 +15,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: setup OpenModelica compiler
       uses: OpenModelica/setup-openmodelica@v1.0.2