diff --git a/.github/workflows/gap.yml b/.github/workflows/gap.yml
index da9670377..12c27b2b5 100644
--- a/.github/workflows/gap.yml
+++ b/.github/workflows/gap.yml
@@ -42,7 +42,7 @@ jobs:
             ABI: 32
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: "Install dependencies"
         if: ${{ runner.os == 'macOS' }}
         run: brew install automake
@@ -86,7 +86,7 @@ jobs:
     env:
       CHERE_INVOKING: 1
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: gap-actions/setup-cygwin@v1
       - uses: gap-actions/setup-gap@cygwin-v2
         with:
@@ -113,7 +113,7 @@ jobs:
       run:
         shell: bash -l {0}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: "Install micromamba environment from environment.yml . . ."
         uses: mamba-org/setup-micromamba@v1
         with:
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 514d27078..004631c20 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -22,7 +22,7 @@ jobs:
           - cpplint
     steps:
     - name: "Check out the repository"
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
     - name: "Set up Python"
       uses: actions/setup-python@v4
     - name: "Install ${{ matrix.linter }} with pip"
diff --git a/.github/workflows/manual.yml b/.github/workflows/manual.yml
index 49ed386c2..8e97d244e 100644
--- a/.github/workflows/manual.yml
+++ b/.github/workflows/manual.yml
@@ -15,7 +15,7 @@ jobs:
     name: "compile and upload manual"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: "Install TeX Live"
         run: |
           packages=(