diff --git a/README.md b/README.md
index 690f620c13933befd26c6e549af90a90b930bd38..722697b73ed0c554d19643b8b799520025f8c7d5 100644
--- a/README.md
+++ b/README.md
@@ -181,6 +181,7 @@ That said, you can also set environment variables for preferred providers.
 
 | Environment Variable        | Provider                                           |
 | --------------------------- | -------------------------------------------------- |
+| `HYPER_API_KEY`             | Charm Hyper                                        |
 | `ANTHROPIC_API_KEY`         | Anthropic                                          |
 | `OPENAI_API_KEY`            | OpenAI                                             |
 | `VERCEL_API_KEY`            | Vercel AI Gateway                                  |