diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 3d3fbc10..47a484ef 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v3
diff --git a/.github/workflows/deploy_pkg.yml b/.github/workflows/deploy_pkg.yml
index 74b3c1e6..74f51c84 100644
--- a/.github/workflows/deploy_pkg.yml
+++ b/.github/workflows/deploy_pkg.yml
@@ -12,13 +12,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           persist-credentials: false
           fetch-depth: 0 # Required for dynamic versioning
 
       - name: Install python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.12"
 
@@ -32,7 +32,7 @@ jobs:
       - name: Check package metadata
         run: twine check dist/*
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v6
         with:
           name: DoubleML-pkg
           path: dist/
@@ -49,7 +49,7 @@ jobs:
 
     steps:
       - name: Download built package
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: DoubleML-pkg
           path: dist/
@@ -65,7 +65,7 @@ jobs:
     needs: publish-to-testpypi
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.12"
 
@@ -98,7 +98,7 @@ jobs:
 
     steps:
       - name: Download built package
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v6
         with:
           name: DoubleML-pkg
           path: dist/
@@ -112,7 +112,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.event_name == 'release'
     steps:
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.12"
 
diff --git a/.github/workflows/pytest.yml b/.github/workflows/pytest.yml
index 163dd399..6548ef26 100644
--- a/.github/workflows/pytest.yml
+++ b/.github/workflows/pytest.yml
@@ -30,12 +30,12 @@ jobs:
           - {os: 'ubuntu-latest', python-version: '3.13'}
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0  # allow version retrieval with setuptools_scm
 
     - name: Set up Python ${{ matrix.config.python-version }}
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.config.python-version }}
 
@@ -74,7 +74,7 @@ jobs:
       if: |
         matrix.config.os == 'ubuntu-latest' &&
         matrix.config.python-version == '3.12'
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v6
       with:
         name: code-coverage-report
         path: |