diff --git a/.github/workflows/flake8.yml b/.github/workflows/flake8.yml
index c964166..5717b5d 100644
--- a/.github/workflows/flake8.yml
+++ b/.github/workflows/flake8.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
 
       - name: Set up Python
         uses: actions/setup-python@v4
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 7d36f6a..56001c1 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
+      uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
       # with:
       #   path: "."
     - name: Set up Docker Buildx