diff --git a/.github/workflows/preview.yaml b/.github/workflows/preview.yaml
index a8a34f02c..f05a3463e 100644
--- a/.github/workflows/preview.yaml
+++ b/.github/workflows/preview.yaml
@@ -31,7 +31,7 @@ jobs:
         with:
           repository: cdr/m
           ref: refs/heads/master
-          token: ${{ secrets.GH_ACCESS_TOKEN }}
+          ssh-key: ${{ secrets.READONLY_M_DEPLOY_KEY }}
           submodules: true
           fetch-depth: 0