diff --git a/generic_rag/app.py b/generic_rag/app.py
index aabbee1..999b910 100644
--- a/generic_rag/app.py
+++ b/generic_rag/app.py
@@ -91,14 +91,14 @@ vector_store = Chroma(
 
 if args.use_conditional_graph:
     graph = CondRetGenLangGraph(
-        vector_store,
+        vector_store=vector_store,
         chat_model=get_chat_model(args.chat_backend),
         embedding_model=get_embedding_model(args.emb_backend),
         system_prompt=system_prompt,
     )
 else:
     graph = RetGenLangGraph(
-        vector_store,
+        vector_store=vector_store,
         chat_model=get_chat_model(args.chat_backend),
         embedding_model=get_embedding_model(args.emb_backend),
         system_prompt=system_prompt,