diff --git a/README.md b/README.md
index ce37e33c..ffdd09c6 100644
--- a/README.md
+++ b/README.md
@@ -107,6 +107,8 @@ Here is what you need to be able to run Cal.
    ```sh
    yarn
    ```
+   
+1. Use `openssl rand -base64 32` to generate a key and add it under `NEXTAUTH_SECRET` in the .env file.
 
 #### Quick start with `yarn dx`