diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7b960ec..acd714a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,6 +11,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
         with:
+          persist-credentials: false
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Setup Python
         uses: actions/setup-python@v5
@@ -38,6 +39,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
         with:
+          persist-credentials: false
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Setup Python
         uses: actions/setup-python@v5