diff --git a/README.md b/README.md
index e466e7b..28b4853 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,7 @@ A WIP packet monitor for Minecraft written in Electron.
 You need node.js and npm installed. It should work on all OSes that are supported by node.js and Electron.
 
 - Clone the repo
+- `git submodule update --init`
 - `npm install`
 - `npm start`