diff --git a/{{cookiecutter.repo_name}}/app.json b/{{cookiecutter.repo_name}}/app.json
index 1af80c5d..92358ffa 100644
--- a/{{cookiecutter.repo_name}}/app.json
+++ b/{{cookiecutter.repo_name}}/app.json
@@ -12,6 +12,10 @@
       "description": "Comma-separated list of hosts",
       "value": ".herokuapp.com"
     },
+    "DJANGO_ADMIN_URL": {
+      "description": "A secret URL for the Django admin",
+      "generator": "secret"
+    },
     "DJANGO_AWS_ACCESS_KEY_ID": "",
     "DJANGO_AWS_SECRET_ACCESS_KEY": "",
     "DJANGO_AWS_STORAGE_BUCKET_NAME": "",