Update app.py

app.py

@@ -5,7 +5,7 @@ from langchain_community.document_loaders import PyPDFLoader
 from langchain.text_splitter import RecursiveCharacterTextSplitter  # Correct import
 from langchain_community.embeddings import HuggingFaceEmbeddings
 from langchain_community.vectorstores import FAISS
-from langchain_community.chains import RetrievalQA
+from langchain.chains import RetrievalQA  # Correct import
 from langchain_community.chat_models import ChatOpenAI
 
 # Streamlit App Title