diff --git a/.github/workflows/joss.yml b/.github/workflows/joss.yml
index ac414649..41635887 100644
--- a/.github/workflows/joss.yml
+++ b/.github/workflows/joss.yml
@@ -14,7 +14,7 @@ jobs:
     name: Paper Draft
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v6
       - name: TeX and PDF
         uses: docker://openjournals/paperdraft:latest
         with:
diff --git a/.github/workflows/mpi.yml b/.github/workflows/mpi.yml
index d5fd40f8..5f32e26d 100644
--- a/.github/workflows/mpi.yml
+++ b/.github/workflows/mpi.yml
@@ -53,7 +53,7 @@ jobs:
 
     runs-on: ${{ matrix.platform }}
     steps:
-        - uses: actions/checkout@v2
+        - uses: actions/checkout@v6
         - uses: actions/setup-python@v5
           with:
             python-version: ${{ matrix.python-version }}
@@ -135,7 +135,7 @@ jobs:
     runs-on: ${{ matrix.platform }}
     timeout-minutes: 50
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
diff --git a/.github/workflows/pdoc.yml b/.github/workflows/pdoc.yml
index ba9f8d99..ce5c15d1 100644
--- a/.github/workflows/pdoc.yml
+++ b/.github/workflows/pdoc.yml
@@ -19,7 +19,7 @@ jobs:
         platform: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.platform }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
         with:
           submodules: recursive
           persist-credentials: false
diff --git a/.github/workflows/pypi.yml b/.github/workflows/pypi.yml
index 644dcd85..72ce7f4f 100644
--- a/.github/workflows/pypi.yml
+++ b/.github/workflows/pypi.yml
@@ -24,7 +24,7 @@ jobs:
     permissions:
       id-token: write
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
         with:
           submodules: recursive
           fetch-depth: 0  # https://github.com/pypa/setuptools_scm/issues/480
diff --git a/.github/workflows/readme_julia.yml b/.github/workflows/readme_julia.yml
index 403d37d7..7f0e39de 100644
--- a/.github/workflows/readme_julia.yml
+++ b/.github/workflows/readme_julia.yml
@@ -16,7 +16,7 @@ jobs:
   julia:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v1
         with:
           python-version: "3.10"
diff --git a/.github/workflows/readme_matlab.yml b/.github/workflows/readme_matlab.yml
index 905f28ef..a2d21160 100644
--- a/.github/workflows/readme_matlab.yml
+++ b/.github/workflows/readme_matlab.yml
@@ -22,7 +22,7 @@ jobs:
             python-version: "3.12"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4.2.2
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v5.3.0
         with:
           python-version: ${{ matrix.python-version }}
diff --git a/.github/workflows/readme_python.yml b/.github/workflows/readme_python.yml
index aca45180..dba27f2f 100644
--- a/.github/workflows/readme_python.yml
+++ b/.github/workflows/readme_python.yml
@@ -16,7 +16,7 @@ jobs:
   python:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v1
         with:
           python-version: "3.10"
diff --git a/.github/workflows/readme_rust.yml b/.github/workflows/readme_rust.yml
index a8c77db5..9ae45525 100644
--- a/.github/workflows/readme_rust.yml
+++ b/.github/workflows/readme_rust.yml
@@ -16,7 +16,7 @@ jobs:
   rust:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: rust-src
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 6da03c4b..c6ab4201 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -22,7 +22,7 @@ jobs:
   precommit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v5.2.0
         with:
           python-version: "3.10"
@@ -35,7 +35,7 @@ jobs:
   pylint:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v6
       with:
         submodules: recursive
         fetch-depth: 0 
@@ -67,7 +67,7 @@ jobs:
   devops:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
         with:
           submodules: recursive
           fetch-depth: 0  # https://github.com/pypa/setuptools_scm/issues/480
@@ -120,7 +120,7 @@ jobs:
     runs-on: ${{ matrix.platform }}
     timeout-minutes: ${{ startsWith(matrix.platform, 'windows-') && 115 || 90 }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
         with:
           submodules: recursive
           fetch-depth: 0
@@ -158,7 +158,7 @@ jobs:
       fail-fast: false
     runs-on: ${{ matrix.platform }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v6
         with:
           submodules: recursive
           fetch-depth: 0