diff --git a/semantic_router/layer.py b/semantic_router/layer.py
index 32c57a9f880bcb5392e42d163c6d8bd6ab82d0e9..0bf7d99f4809e08ba490832153da1498a31f8a10 100644
--- a/semantic_router/layer.py
+++ b/semantic_router/layer.py
@@ -475,8 +475,8 @@ class RouteLayer:
             logger.warning("No routes provided to add.")
             return
         # create embeddings for all routes
-        route_names, all_utterances, all_function_schemas, all_metadata = self._extract_routes_details(
-            routes, include_metadata=True
+        route_names, all_utterances, all_function_schemas, all_metadata = (
+            self._extract_routes_details(routes, include_metadata=True)
         )
         embedded_utterances = self.encoder(all_utterances)
         try: