diff --git a/frontend/.env.example b/frontend/.env.example
index e81c748..e63adeb 100644
--- a/frontend/.env.example
+++ b/frontend/.env.example
@@ -8,6 +8,7 @@ NEXT_PUBLIC_APP_URL=http://localhost:3000
 
 # Set WORKER_URLs after deploying the workers.
 # Set NEXT_PUBLIC_WORKERS_KEY to be the same as KEY in /backend/storage/wrangler.toml.
+# These URLs should begin with https:// in production
 NEXT_PUBLIC_DATABASE_WORKER_URL=
 NEXT_PUBLIC_STORAGE_WORKER_URL=
 NEXT_PUBLIC_WORKERS_KEY=