diff --git a/README.md b/README.md
index 049e794..78adec9 100644
--- a/README.md
+++ b/README.md
@@ -44,7 +44,7 @@ Disposable-mailbox can be installed by copying the src directory to a webserver.
 2. download a [release](https://github.com/synox/disposable-mailbox/releases) or clone this repository
 3. copy the files in the `src` directory to your web server (not the whole repo!).
 4. rename `config.sample.php` to `config.php` and apply the imap settings. Move `config.php` to a safe location outside the `public_html`.
-5. edit `index.php` and set the new path to `config.php`.
+5. edit `index.php` and `json-api.php`: set the new path to `config.php`.
 6. open it in your browser, check your php error log for messages.