diff --git a/Cargo.toml b/Cargo.toml
index f80ee05..fdee45d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "openai-api-rs"
-version = "0.1.11"
+version = "0.1.12"
 edition = "2021"
 authors = ["Dongri Jin <dongrify@gmail.com>"]
 license = "MIT"
diff --git a/README.md b/README.md
index 471abbf..70bcd3f 100644
--- a/README.md
+++ b/README.md
@@ -1,13 +1,13 @@
 # OpenAI API client library for Rust (unofficial)
 The OpenAI API client Rust library provides convenient access to the OpenAI API from Rust applications.
 
-Check out the [docs.rs](https://docs.rs/openai-api-rs/0.1.11/openai_api_rs/v1/index.html).
+Check out the [docs.rs](https://docs.rs/openai-api-rs/).
 
 ## Installation:
 Cargo.toml
 ```toml
 [dependencies]
-openai-api-rs = "0.1.11"
+openai-api-rs = "0.1"
 ```
 
 ## Usage
@@ -18,6 +18,11 @@ The library needs to be configured with your account's secret key, which is avai
 $ export OPENAI_API_KEY=sk-xxxxxxx
 ```
 
+### Set OPENAI_API_ENDPOINT to environment variable (optional)
+```bash
+$ export OPENAI_API_ENDPOINT=https://api.openai.com/v1
+```
+
 ### Create client
 ```rust
 use openai_api_rs::v1::api::Client;
diff --git a/src/v1/api.rs b/src/v1/api.rs
index c04925b..5d35707 100644
--- a/src/v1/api.rs
+++ b/src/v1/api.rs
@@ -35,7 +35,9 @@ pub struct Client {
 
 impl Client {
     pub fn new(api_key: String) -> Self {
-        Self::new_with_endpoint(API_URL_V1.to_owned(), api_key)
+        let endpoint =
+            std::env::var("OPENAI_API_ENDPOINT").unwrap_or_else(|_| API_URL_V1.to_owned());
+        Self::new_with_endpoint(endpoint, api_key)
     }
 
     pub fn new_with_endpoint(api_endpoint: String, api_key: String) -> Self {