diff --git a/.github/workflows/pr-checks.yml b/.github/workflows/pr-checks.yml
index 03dc1744..5361f84e 100644
--- a/.github/workflows/pr-checks.yml
+++ b/.github/workflows/pr-checks.yml
@@ -28,7 +28,7 @@ jobs:
     # based on.
     - name: Checkout head commits
       # https://github.com/actions/checkout
-      uses: actions/checkout@v2.3.5
+      uses: actions/checkout@v2.4.0
       #with:
         #ref: ${{github.head.sha}}
         #repository: ${{github.event.pull_request.head.repo.full_name}}
diff --git a/.github/workflows/push-checks.yml b/.github/workflows/push-checks.yml
index 8c7f54b3..021b9109 100644
--- a/.github/workflows/push-checks.yml
+++ b/.github/workflows/push-checks.yml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-18.04
 
     steps:
-    - uses: actions/checkout@v2.3.5
+    - uses: actions/checkout@v2.4.0
       with:
         fetch-depth: 0
     - name: Set up Python 3.9
diff --git a/.github/workflows/windows-build.yml b/.github/workflows/windows-build.yml
index 06c1c027..05e01364 100644
--- a/.github/workflows/windows-build.yml
+++ b/.github/workflows/windows-build.yml
@@ -16,7 +16,7 @@ jobs:
         shell: powershell
 
     steps:
-      - uses: actions/checkout@v2.3.5
+      - uses: actions/checkout@v2.4.0
       - uses: actions/setup-python@v2.2.2
         with:
           python-version: "3.9.7"