diff --git a/README.md b/README.md
index d8092b8108332fb23db99747aa144b3ab115f490..d5328a166445346e9d225a576351caaed4de3530 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,10 @@ In order to use the slide deck, you must have:
     ```bash
     $ git clone --recurse-submodules ssh://git@git-r3lab-server.uni.lu:8022/<yourUsername>/presentations.git
     ```
+- Be sure all submodules are installed and updated:
+    ```bash
+    $ git submodule update --init --recursive
+    ```
 - Open a terminal and work on your presentation:
     ```bash
     $ cd presentations