diff --git a/.github/workflows/ccpp.yml b/.github/workflows/ccpp.yml
index 19ea848f..ff81b523 100644
--- a/.github/workflows/ccpp.yml
+++ b/.github/workflows/ccpp.yml
@@ -21,9 +21,10 @@ jobs:
     - uses: actions/setup-python@v1
       with:
         python-version: ${{ matrix.python-version }}
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
       with:
         submodules: true # 'recursive' 'true' or 'false'
+        persist-credentials: false
     - name: apt dependencies
       if: contains(matrix.os, 'ubuntu')
       run: |