diff --git a/.github/workflows/codespell.yml b/.github/workflows/codespell.yml
index e1cbf07a2..8050eb567 100644
--- a/.github/workflows/codespell.yml
+++ b/.github/workflows/codespell.yml
@@ -10,5 +10,5 @@ jobs:
   codespell:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: codespell-project/actions-codespell@v2
diff --git a/.github/workflows/config_options.yml b/.github/workflows/config_options.yml
index 3bed20686..fe32038f6 100644
--- a/.github/workflows/config_options.yml
+++ b/.github/workflows/config_options.yml
@@ -37,7 +37,7 @@ jobs:
       run:
         shell: bash -l {0}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Output g++ version . . .
         run: g++ --version
       - name: Install micromamba environment from environment.yml . . .
@@ -97,7 +97,7 @@ jobs:
             without-intrinsics: ""
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Output g++ version . . .
         run: g++ --version
       - name: Install GAP and clone/compile necessary packages . . .
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 48fcac9de..319790fd4 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -29,7 +29,7 @@ jobs:
           - cpplint
     steps:
       - name: Check out the repository . . .
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Set up Python . . .
         uses: actions/setup-python@v6
       - name: Install ${{ matrix.linter }} with pip . . .
diff --git a/.github/workflows/manual.yml b/.github/workflows/manual.yml
index 3aea572fc..d432712af 100644
--- a/.github/workflows/manual.yml
+++ b/.github/workflows/manual.yml
@@ -22,7 +22,7 @@ jobs:
     name: compile and upload manual
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Install TeX Live . . .
         run: |
           packages=(
diff --git a/.github/workflows/os.yml b/.github/workflows/os.yml
index 239866d7d..8bdd87200 100644
--- a/.github/workflows/os.yml
+++ b/.github/workflows/os.yml
@@ -40,7 +40,7 @@ jobs:
 
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: gap-actions/setup-cygwin@v2
         if: ${{ runner.os == 'Windows' }}
       - name: Output g++ version . . .
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index f19a8b58c..5a5ce30d3 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: gap-actions/setup-gap@v3
         with:
           gap-version: latest
diff --git a/.github/workflows/ubuntu.yml b/.github/workflows/ubuntu.yml
index fa00f3928..8d040b011 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -47,7 +47,7 @@ jobs:
             pkgs-to-build: io* orb* datastructures* profiling* grape*
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Output g++ version . . .
         run: g++ --version
       - name: "Install GAP . . ."
@@ -67,7 +67,7 @@ jobs:
           cd ${GAPROOT}/pkg
           ../bin/BuildPackages.sh --strict ${{ matrix.pkgs-to-build }}
       - name: "Install digraphs-lib . . ."
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           repository: digraphs/digraphs-lib
           path: digraphs-lib
diff --git a/.github/workflows/valgrind.yml b/.github/workflows/valgrind.yml
index 1840a7cda..13a8fea58 100644
--- a/.github/workflows/valgrind.yml
+++ b/.github/workflows/valgrind.yml
@@ -27,7 +27,7 @@ jobs:
     name: Ubuntu / GAP stable-4.15 / valgrind
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: "Output g++ version . . ."
         run: g++ --version
       - name: "Install Valgrind . . ."