Update app.py

app.py

@@ -67,7 +67,8 @@ def load_pdf(file_path):
     return VectorStore
 
 def load_chatbot():
-    return load_qa_chain(llm=OpenAI(), chain_type="stuff") 
+    return load_qa_chain(llm=OpenAI(temperature=0.2, max_tokens=50), chain_type="stuff") 
+
 
 def display_chat_history(chat_history):
     for chat in chat_history: