diff --git a/.github/workflows/firebase-hosting-staging.yml b/.github/workflows/firebase-hosting-staging.yml
index 55f08e0..707dad2 100644
--- a/.github/workflows/firebase-hosting-staging.yml
+++ b/.github/workflows/firebase-hosting-staging.yml
@@ -35,7 +35,7 @@ jobs:
             - name: Install dependencies and build
               env:
                   APP_ENV: staging
-                  NEXT_PUBLIC_API_BASE_URL: ${{ vars.NEXT_PUBLIC_API_BASE_URL }}
+                  NEXT_PUBLIC_API_BASE_URL: ${{ env.NEXT_PUBLIC_API_BASE_URL }}
               run: |
                   cd frontend
                   npm ci
@@ -53,4 +53,4 @@ jobs:
                   entryPoint: ./frontend
               env:
                   FIREBASE_CLI_EXPERIMENTS: webframeworks
-                  NEXT_PUBLIC_API_BASE_URL: ${{ vars.NEXT_PUBLIC_API_BASE_URL }}
+                  NEXT_PUBLIC_API_BASE_URL: ${{ env.NEXT_PUBLIC_API_BASE_URL }}