diff --git a/README.md b/README.md
index 8559f1e..5449f8a 100644
--- a/README.md
+++ b/README.md
@@ -9,5 +9,5 @@ Companion for Invidious which handle all the video stream retrieval from YouTube
 ## Run Locally
 
 ```
-deno task dev
+SERVER_HMAC_KEY=CHANGEME deno task dev
 ```
\ No newline at end of file