diff --git a/.github/workflows/backend.yaml b/.github/workflows/backend.yaml
index b6f70efd..7e0d55dd 100644
--- a/.github/workflows/backend.yaml
+++ b/.github/workflows/backend.yaml
@@ -53,7 +53,7 @@ jobs:
       # https://github.com/google-github-actions/auth
       - name: Auth with Google Cloud
         id: auth
-        uses: 'google-github-actions/auth@v2'
+        uses: 'google-github-actions/auth@v3'
         with:
           workload_identity_provider: 'projects/1037550336239/locations/global/workloadIdentityPools/default-pool/providers/default-provider'
           service_account: 'gh-action-cloudrun@hwakabh-dev.iam.gserviceaccount.com'