diff --git a/README.md b/README.md
index 41a9995..07c611e 100644
--- a/README.md
+++ b/README.md
@@ -79,10 +79,14 @@ Default setup configuration:
 
 Given its early stage, `avante.nvim` currently supports the following basic functionalities:
 
-1. Set `ANTHROPIC_API_KEY` environment variable.
+1. Set `ANTHROPIC_API_KEY` environment variable:
 ```sh
 export ANTHROPIC_API=your-api-key
 ```
+Or set `OPENAI_API_KEY` environment variable:
+```sh
+export OPENAI_API_KEY=your-api-key
+```
 2. Open a code file in Neovim.
 3. Use the `:AvanteAsk` command to query the AI about the code.
 4. Review the AI's suggestions.