diff --git a/01_Hello_Langchain/Hello_Langchain.ipynb b/01_Hello_Langchain/Hello_Langchain.ipynb
index 5713008..221a983 100644
--- a/01_Hello_Langchain/Hello_Langchain.ipynb
+++ b/01_Hello_Langchain/Hello_Langchain.ipynb
@@ -1,26 +1,10 @@
 {
-  "nbformat": 4,
-  "nbformat_minor": 0,
-  "metadata": {
-    "colab": {
-      "provenance": [],
-      "authorship_tag": "ABX9TyPlnXQSa14sK6jqVM6IBQr7",
-      "include_colab_link": true
-    },
-    "kernelspec": {
-      "name": "python3",
-      "display_name": "Python 3"
-    },
-    "language_info": {
-      "name": "python"
-    }
-  },
   "cells": [
     {
       "cell_type": "markdown",
       "metadata": {
-        "id": "view-in-github",
-        "colab_type": "text"
+        "colab_type": "text",
+        "id": "view-in-github"
       },
       "source": [
         "<a href=\"https://colab.research.google.com/github/sugarforever/wtf-langchain/blob/main/01_Hello_Langchain/Hello_Langchain.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
@@ -34,22 +18,13 @@
       },
       "outputs": [],
       "source": [
-        "!pip install langchain==0.0.235 openai"
+        "# openai 新版本后会报一个chat error错误，需要安装旧版本\n",
+        "!pip install langchain==0.0.235 openai==0.28.1"
       ]
     },
     {
       "cell_type": "code",
-      "source": [
-        "from langchain.chat_models import ChatOpenAI\n",
-        "from langchain.schema import HumanMessage\n",
-        "\n",
-        "import os\n",
-        "os.environ['OPENAI_API_KEY'] = '您的有效OpenAI API Key'\n",
-        "\n",
-        "chat = ChatOpenAI(temperature=0)\n",
-        "response = chat([ HumanMessage(content=\"Hello Langchain!\") ])\n",
-        "print(response)"
-      ],
+      "execution_count": 3,
       "metadata": {
         "colab": {
           "base_uri": "https://localhost:8080/"
@@ -57,16 +32,42 @@
         "id": "7t2nQzTEGXy1",
         "outputId": "f0f35ba0-48e2-439c-f754-2862884ad049"
       },
-      "execution_count": 3,
       "outputs": [
         {
-          "output_type": "stream",
           "name": "stdout",
+          "output_type": "stream",
           "text": [
             "content='Hello! How can I assist you today?' additional_kwargs={} example=False\n"
           ]
         }
+      ],
+      "source": [
+        "from langchain.chat_models import ChatOpenAI\n",
+        "from langchain.schema import HumanMessage\n",
+        "\n",
+        "import os\n",
+        "os.environ['OPENAI_API_KEY'] = '您的有效OpenAI API Key'\n",
+        "\n",
+        "chat = ChatOpenAI(temperature=0)\n",
+        "response = chat([ HumanMessage(content=\"Hello Langchain!\") ])\n",
+        "print(response)"
       ]
     }
-  ]
-}
\ No newline at end of file
+  ],
+  "metadata": {
+    "colab": {
+      "authorship_tag": "ABX9TyPlnXQSa14sK6jqVM6IBQr7",
+      "include_colab_link": true,
+      "provenance": []
+    },
+    "kernelspec": {
+      "display_name": "Python 3",
+      "name": "python3"
+    },
+    "language_info": {
+      "name": "python"
+    }
+  },
+  "nbformat": 4,
+  "nbformat_minor": 0
+}