diff --git a/.github/workflows/firebase-preview.yml b/.github/workflows/firebase-preview.yml
index 24d101b7..96a85cf5 100644
--- a/.github/workflows/firebase-preview.yml
+++ b/.github/workflows/firebase-preview.yml
@@ -31,5 +31,5 @@ jobs:
           repoToken: '${{ secrets.GITHUB_TOKEN }}'
           firebaseServiceAccount: '${{ secrets.FIREBASE_SERVICE_ACCOUNT_BLOWFISH_21FFF }}'
           expires: 30d
-          channelId: preview-${GITHUB_REF##*/}
+          channelId: preview-${{ github.event.number }}
           projectId: blowfish-21fff