diff --git a/.github/workflows/manifest.yml b/.github/workflows/manifest.yml
index c06257f..bdc364c 100644
--- a/.github/workflows/manifest.yml
+++ b/.github/workflows/manifest.yml
@@ -15,6 +15,7 @@
           path: zephyrproject/zephyr
           ref: ${{ github.event.pull_request.head.sha }}
           fetch-depth: 0
+          persist-credentials: false
 
       - name: Manifest
         uses: zephyrproject-rtos/action-manifest@main