diff --git a/Readme.md b/Readme.md
index dcc1c85..e474b85 100644
--- a/Readme.md
+++ b/Readme.md
@@ -25,6 +25,8 @@
 
 To install both expresso _and_ node-jscoverage run:
 
+    $ git submodule init
+    $ git submodule update
     $ make install
 
 To install expresso alone (no build required) run: