Update app.py

app.py

@@ -52,13 +52,13 @@ retriever = vector_store.as_retriever(search_type="similarity", search_kwargs={"
 keyword_retriever = BM25Retriever.from_documents(docs)
 keyword_retriever.k =  3
 ensemble_retriever = EnsembleRetriever(retrievers=[retriever,keyword_retriever],
-                                       weights=[0.6, 0.5])
+                                       weights=[0.5, 0.5])
 
-llm = ChatOpenAI(model="gpt-3.5-turbo", temperature=0.3)
+llm = ChatOpenAI(model="gpt-3.5-turbo", temperature=0.4)
 
 conversational_chain = ConversationalRetrievalChain.from_llm(
     llm=llm,
-    retriever=keyword_retriever,
+    retriever=ensemble_retriever,
     memory=memory,
     verbose=True 
 )