diff --git a/.github/workflows/macos_build.yml b/.github/workflows/macos_build.yml
index f24b5f4d..3f299f80 100644
--- a/.github/workflows/macos_build.yml
+++ b/.github/workflows/macos_build.yml
@@ -17,7 +17,7 @@ jobs:
           - "3.12"
     runs-on: macos-11
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       # Normally, we would use the superbly maintained...
       # - uses: actions/setup-python@v2
       #   with:
diff --git a/.github/workflows/modified_scripts_build.yml b/.github/workflows/modified_scripts_build.yml
index be106ee5..0beef58e 100644
--- a/.github/workflows/modified_scripts_build.yml
+++ b/.github/workflows/modified_scripts_build.yml
@@ -6,7 +6,7 @@ jobs:
     outputs:
       versions: ${{steps.modified-versions.outputs.versions}}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: git fetch origin "$GITHUB_BASE_REF"
       - shell: bash
         run: >
@@ -33,7 +33,7 @@ jobs:
         os: ["macos-11", "macos-12"]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: |
           #envvars
           export PYENV_ROOT="$GITHUB_WORKSPACE"
@@ -93,7 +93,7 @@ jobs:
         os: ["ubuntu-20.04", "ubuntu-22.04"]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: |
           #envvars
           export PYENV_ROOT="$GITHUB_WORKSPACE"
diff --git a/.github/workflows/pyenv_tests.yml b/.github/workflows/pyenv_tests.yml
index dc905d14..f05430cd 100644
--- a/.github/workflows/pyenv_tests.yml
+++ b/.github/workflows/pyenv_tests.yml
@@ -16,7 +16,7 @@ jobs:
           - macos-11
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       # Normally, we would use the superbly maintained...
       # - uses: actions/setup-python@v2
       #   with:
diff --git a/.github/workflows/ubuntu_build.yml b/.github/workflows/ubuntu_build.yml
index e5ba9a4d..e3951d3c 100644
--- a/.github/workflows/ubuntu_build.yml
+++ b/.github/workflows/ubuntu_build.yml
@@ -17,7 +17,7 @@ jobs:
           - "3.12"
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       # Normally, we would use the superbly maintained...
       # - uses: actions/setup-python@v2
       #   with: