LLMChain Error

[saify-codes]

import { OpenAI } from "langchain/llms/openai";
import { LLMChain } from "langchain/chains";
import { BufferMemory } from "langchain/memory";
import { PromptTemplate } from "langchain/prompts";
const llm = new OpenAI({
  openAIApiKey: "my-key",
  temperature: 0.5,
});
const memory = new BufferMemory()
const chain = new LLMChain({ llm, memory }); // error

it was working fine but after doing npm update its giving me error:
if (this.prompt.outputParser) {
^
TypeError: Cannot read properties of undefined (reading 'outputParser')