diff --git a/cloudbuild.yaml b/cloudbuild.yaml
index cc099175..de1a6818 100644
--- a/cloudbuild.yaml
+++ b/cloudbuild.yaml
@@ -30,7 +30,7 @@ steps:
       '--max-instances', '4',
       '--memory', '256M',
       '--cpu', '1',
-      '-update-secrets', '/app/.env=mle_django_settings:latest'
+      '--update-secrets', '/app/.env=mle_django_settings:latest'
   ]
 
 images:
diff --git a/config/settings/production.py b/config/settings/production.py
index fcd77037..ec3c919b 100644
--- a/config/settings/production.py
+++ b/config/settings/production.py
@@ -99,7 +99,7 @@
 # ADMIN
 # ------------------------------------------------------------------------------
 # Django Admin URL regex.
-ADMIN_URL = env("DJANGO_ADMIN_URL")
+ADMIN_URL = env("DJANGO_ADMIN_URL", default="admin/")
 
 # Anymail
 # ------------------------------------------------------------------------------