diff --git a/swh/indexer/storage/api/server.py b/swh/indexer/storage/api/server.py
--- a/swh/indexer/storage/api/server.py
+++ b/swh/indexer/storage/api/server.py
@@ -67,7 +67,7 @@
 @click.option('--debug/--nodebug', default=True,
               help="Indicates if the server should run in debug mode")
 def launch(config_path, host, port, debug):
-    app.config.update(config.read(config_path, DEFAULT_CONFIG))
+    app.config.update(config.read_raw_config(config_path))
     app.run(host, port=int(port), debug=bool(debug))