diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4c92682..3e9ccb3 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,7 +15,9 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        with:
+          persist-credentials: false
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
@@ -81,7 +83,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        with:
+          persist-credentials: false
 
       - name: Set up Python
         uses: actions/setup-python@v5
diff --git a/.github/workflows/visual-tests.yml b/.github/workflows/visual-tests.yml
index 9d3e3d4..dac7148 100644
--- a/.github/workflows/visual-tests.yml
+++ b/.github/workflows/visual-tests.yml
@@ -30,7 +30,9 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        with:
+          persist-credentials: false
 
       - name: Set up Python ${{ inputs.python_version || '3.11' }}
         uses: actions/setup-python@v5
@@ -228,7 +230,9 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+        with:
+          persist-credentials: false
 
       - name: Set up Python 3.11
         uses: actions/setup-python@v5