diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c0aee797..b01e7dce 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -26,6 +26,8 @@ jobs:
     runs-on: ${{ inputs.runner }}
     steps:
       - uses: actions/checkout@v2
+        with:
+          persist-credentials: false
       - name: Configure System
         run: |
           sudo apt-get update -y
diff --git a/.github/workflows/multikernel-tester.yml b/.github/workflows/multikernel-tester.yml
index a24f45e1..e7facdf4 100644
--- a/.github/workflows/multikernel-tester.yml
+++ b/.github/workflows/multikernel-tester.yml
@@ -39,6 +39,8 @@ jobs:
     steps:
     - name: Checkout repository
       uses: actions/checkout@v2
+      with:
+        persist-credentials: false
     - name: Install packages needed for testing
       run: |
         sudo apt-get update