diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0d1f092..2239e83 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -141,7 +141,7 @@ jobs:
         if: github.ref_type == 'tag'
         run: |
           auth='${{ secrets.CHRISPROJECT_USERNAME }}:${{ secrets.CHRISPROJECT_PASSWORD }}'
-          chris_url="https://cube.chrisproject.org/api/v1/"
+          chris_url='https://cube.chrisproject.org/api/v1/'
           admin_url="$(curl -sSf -u "$auth" '${{ chris_url }}' -H 'Accept: application/json' | jq -r '.collection_links.admin')"
           compute_names="NERC"
           if [ "$admin_url" = "null" ]; then