diff --git a/.env.example b/.env.example
index 9003c36..8d5bb1f 100644
--- a/.env.example
+++ b/.env.example
@@ -1,3 +1,14 @@
-# hello
-OPENAI_API_KEY=""
-wtf='234'
+#!/bin/bash
+# Description: Env file for askchat.
+# Current version: 0.1.1
+
+# The base url of the API (without suffix /v1)
+OPENAI_API_BASE_URL='localhost:8000'
+
+# Your API key
+OPENAI_API_KEY='EMPTY'
+
+# The model name.
+# You can use `askchat --all-valid-models` to see the valid models
+OPENAI_API_MODEL='baichuan2'
+
diff --git a/askchat/__init__.py b/askchat/__init__.py
index a5add33..3c283ca 100644
--- a/askchat/__init__.py
+++ b/askchat/__init__.py
@@ -2,6 +2,6 @@
 
 __author__ = """Rex Wang"""
 __email__ = '1073853456@qq.com'
-__version__ = '0.1.1'
+__version__ = '0.2.0'
 
 from .askchat import ask
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 6115ffb..6b348c2 100644
--- a/setup.py
+++ b/setup.py
@@ -4,7 +4,7 @@
 
 from setuptools import setup, find_packages
 
-VERSION = '0.1.1'
+VERSION = '0.2.0'
 
 with open('README.md') as readme_file:
     readme = readme_file.read()
@@ -26,6 +26,7 @@
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
     ],
     description="Interact with ChatGPT in terminal via chattool",
     install_requires=requirements,