diff --git a/.github/workflows/preview.yml b/.github/workflows/preview.yml
index c64006fdf..5dbb659e1 100644
--- a/.github/workflows/preview.yml
+++ b/.github/workflows/preview.yml
@@ -27,7 +27,7 @@ jobs:
       connect-branch: portal-bridge
       advanced-tools-branch: advanced-tools
       environment: Cloudflare-Preview
-      public-url: "${{ needs.branch-sha.outputs.value }}/"
+      public-url: "/${{ needs.branch-sha.outputs.value }}"
       project-branch: ${{ github.event.workflow_run.head_branch }}
     secrets: inherit
     needs: