diff --git a/.github/workflows/build_linux.yml b/.github/workflows/build_linux.yml
index 546f2425..efb09999 100644
--- a/.github/workflows/build_linux.yml
+++ b/.github/workflows/build_linux.yml
@@ -75,7 +75,9 @@ jobs:
       CFLAGS: "-I /usr/local/include"
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
+        with:
+          persist-credentials: false
 
       - name: provide toolchain
         run: |
diff --git a/.github/workflows/doxygen.yml b/.github/workflows/doxygen.yml
index d8a7ec75..fb0b0cad 100644
--- a/.github/workflows/doxygen.yml
+++ b/.github/workflows/doxygen.yml
@@ -42,7 +42,9 @@ jobs:
       - uses: actions/setup-node@v6
         with:
           node-version: 24.x
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
+        with:
+          persist-credentials: false
       - name: Install cSpell
         run: npm install -g cspell
       - run: npx cspell --gitignore --config cspell.config.yaml .