diff --git a/README.md b/README.md
index 26c3aa7..24868d4 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,10 @@
 
 This project was generated with [Angular CLI](https://github.com/angular/angular-cli) version 7.3.8.
 
+## Building libraries
+
+Run `npm run build:library` to build dependency library.
+
 ## Development server
 
 Run `ng serve` for a dev server. Navigate to `http://localhost:4200/`. The app will automatically reload if you change any of the source files.