diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 009af81fb0..aa9247fde2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -50,14 +50,14 @@ jobs:
           echo "BRANCH_REF=$(echo '${{ github.ref }}' | sed -E 's/[^A-Za-z0-9]+/-/g')" >> $GITHUB_ENV
           echo "BASE_IMAGE=ubuntu:18.04" >> $GITHUB_ENV
           echo "CORE_IMAGE=dependabot/dependabot-core" >> $GITHUB_ENV
-          echo "CORE_CI_IMAGE=dependabot/dependabot-core-ci" >> $GITHUB_ENV
+          echo "CORE_CI_IMAGE=ghcr.io/${{ github.repository_owner }}/dependabot-core/dependabot-core-ci" >> $GITHUB_ENV
       - name: Log in to Docker registry
         run: |
-          if [ -n "${{ secrets.DOCKER_USERNAME }}" ] && [ -n "${{ secrets.DOCKER_PASSWORD }}" ]; then
-            echo ${{ secrets.DOCKER_PASSWORD }} | docker login -u ${{ secrets.DOCKER_USERNAME }} --password-stdin
-            echo "DOCKER_LOGGED_IN=true" >> $GITHUB_ENV
-          else
+          if [[ -z "${{ secrets.GHCR_PAT }}" ]]; then
             echo "No Docker credentials, skipping login"
+          else
+            echo "${{ secrets.GHCR_PAT }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
+            echo "DOCKER_LOGGED_IN=true" >> $GITHUB_ENV
           fi
       - name: Set test env credentials
         run: |