diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 34ebdff..c483690 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -29,7 +29,7 @@ jobs:
         run: python3 -m pip install --user "tox>=4.0.0"
 
       - name: Check out src from Git
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0 # needed by setuptools-scm
           submodules: true
diff --git a/.github/workflows/run.yml b/.github/workflows/run.yml
index bea9ccb..661bfb6 100644
--- a/.github/workflows/run.yml
+++ b/.github/workflows/run.yml
@@ -12,7 +12,7 @@ jobs:
   tox-matrix:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3.5.0
+      - uses: actions/checkout@v4
         with:
           ref: ${{github.event.pull_request.head.ref}}
           repository: ${{ github.event.pull_request.head.repo.full_name }}
@@ -42,7 +42,7 @@ jobs:
     name: ${{ matrix.entry.name }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3.5.0
+      - uses: actions/checkout@v4
         with:
           ref: ${{ github.event.pull_request.head.sha }}
           fetch-depth: 0
diff --git a/.github/workflows/tox.yml b/.github/workflows/tox.yml
index 8e54af0..9c4a7ff 100644
--- a/.github/workflows/tox.yml
+++ b/.github/workflows/tox.yml
@@ -40,7 +40,7 @@ jobs:
       matrix: ${{ fromJson(needs.pre.outputs.matrix) }}
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0 # needed by setuptools-scm