diff --git a/.env.local.example b/.env.local.example
index 003bf57..752af4e 100644
--- a/.env.local.example
+++ b/.env.local.example
@@ -1,6 +1,6 @@
 # Chatbot UI
 DEFAULT_MODEL=gpt-3.5-turbo
-DEFAULT_SYSTEM_PROMPT=You are ChatGPT, a large language model trained by OpenAI. Follow the user's instructions carefully. Respond using markdown.
+NEXT_PUBLIC_DEFAULT_SYSTEM_PROMPT=You are ChatGPT, a large language model trained by OpenAI. Follow the user's instructions carefully. Respond using markdown.
 OPENAI_API_KEY=YOUR_KEY
 
 # Google
diff --git a/README.md b/README.md
index 7bc4a7f..47b4966 100644
--- a/README.md
+++ b/README.md
@@ -121,7 +121,7 @@ When deploying the application, the following environment variables can be set:
 | AZURE_DEPLOYMENT_ID   |                                | Needed when Azure OpenAI, Ref [Azure OpenAI API](https://learn.microsoft.com/zh-cn/azure/cognitive-services/openai/reference#completions)                                |
 | OPENAI_ORGANIZATION   |                                | Your OpenAI organization ID                             |
 | DEFAULT_MODEL         | `gpt-3.5-turbo`                | The default model to use on new conversations, for Azure use `gpt-35-turbo` |
-| DEFAULT_SYSTEM_PROMPT | [see here](utils/app/const.ts) | The default system prompt to use on new conversations   |
+| NEXT_PUBLIC_DEFAULT_SYSTEM_PROMPT | [see here](utils/app/const.ts) | The default system prompt to use on new conversations   |
 | GOOGLE_API_KEY        |                                | See [Custom Search JSON API documentation][GCSE]        |
 | GOOGLE_CSE_ID         |                                | See [Custom Search JSON API documentation][GCSE]        |