diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1c468ce..f603552 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,6 +33,7 @@ jobs:
         run: npm run lint
       - name: Build Docker
         env:
+          HOST_NAME: busmap.ci
           BM_COOKIE_SECRET: ${{ secrets.BM_COOKIE_SECRET }}
           BM_POSTGRES_PASSWORD: ${{ secrets.BM_POSTGRES_PASSWORD }}
           BM_POSTGRES_USER: ${{ secrets.BM_POSTGRES_USER }}
diff --git a/compose.yaml b/compose.yaml
index fe29c90..8af82a7 100644
--- a/compose.yaml
+++ b/compose.yaml
@@ -42,7 +42,7 @@ services:
       context: .
       target: web
       args:
-        HOST_NAME: ${HOST_NAME}
+        HOST_NAME: ${HOST_NAME:?err}
         VITE_GOOG_CLIENT_ID: ${SSO_GOOG_CLIENT_ID:?err}
     container_name: stage
     ports: