diff --git a/README.md b/README.md
index 6ed6a89..708ee00 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,8 @@ and build RaLib, which requires a JDK and Maven to be
 installed.
 
 ```
-git submodules init
+git submodule init
+git submodule update
 ./build.sh
 ```