diff --git a/README.md b/README.md
index 28d5221..99996dd 100644
--- a/README.md
+++ b/README.md
@@ -12,3 +12,4 @@ It works like a gateway by serving a I4.0 Interface (the Asset Administration Sh
 
 `lib` must be build first, as it's currently not in npm and `example` uses it by path.
 Both can be built using `npm run build` and both have documentation that can be created using `npm run docs`.
+(Of course you have to run `npm install before`.)