diff --git a/README.md b/README.md
index 8f383c9..0c24219 100644
--- a/README.md
+++ b/README.md
@@ -85,7 +85,7 @@ To develop:
 0. Make a fork and clone the repository.
 1. Install `npm`. Linux: `sudo apt install npm` (or your favourite package manager), Windows: install nodeJS: https://nodejs.org/en/download/
 2. Run `npm install` to install the package dependencies
-3. Run `npm run generate` to generate some additional dependencies
+3. Run `npm run generate` and `npm run generate:editor-layer-index` to generate some additional dependencies
 4. Run `npm run start` to host a local testversion at http://localhost:1234/index.html
 5. By default, the 'bookcases'-theme is loaded. In order to load another theme, use `layout=themename` or `userlayout=true#<layout configuration>`. Note that the custom URLs (e.g. `bookcases.html`, `aed.html`, ...) _don't_ exist on the development version. (These are automatically generated from a template on the server).
 
@@ -264,4 +264,4 @@ Bench icons from StreetComplete: https://github.com/westnordost/StreetComplete/t
 
 Urinal icon: https://thenounproject.com/term/urinal/1307984/
 
-24/7 icon: https://www.vecteezy.com/vector-art/1394992-24-7-service-and-support-icon-set
\ No newline at end of file
+24/7 icon: https://www.vecteezy.com/vector-art/1394992-24-7-service-and-support-icon-set