diff --git a/README.md b/README.md
index e3b7caa..64979d6 100644
--- a/README.md
+++ b/README.md
@@ -100,6 +100,7 @@ Just create an empty directory and run the tests until you get a good result.
 ```sh
 git clone git@github.com:webinstall/webi-installers.git
 pushd ./webi-installers/
+git submodule update --init
 npm install
 ```