diff --git a/utils/const.ts b/utils/const.ts
new file mode 100644
index 00000000..470f4b5c
--- /dev/null
+++ b/utils/const.ts
@@ -0,0 +1,2 @@
+export const OPENAI_API_HOST =
+  process.env.OPENAI_API_HOST || 'https://api.openai.com';
\ No newline at end of file
diff --git a/utils/index.ts b/utils/index.ts
index da19d816..866d8ecd 100644
--- a/utils/index.ts
+++ b/utils/index.ts
@@ -4,6 +4,7 @@ import {
   ParsedEvent,
   ReconnectInterval,
 } from 'eventsource-parser';
+import { OPENAI_API_HOST } from './const';
 
 const createPrompt = (
   inputLanguage: string,
@@ -82,7 +83,7 @@ export const OpenAIStream = async (
 
   const system = { role: 'system', content: prompt };
 
-  const res = await fetch(`https://api.openai.com/v1/chat/completions`, {
+  const res = await fetch(`${OPENAI_API_HOST}/v1/chat/completions`, {
     headers: {
       'Content-Type': 'application/json',
       Authorization: `Bearer ${key || process.env.OPENAI_API_KEY}`,