diff --git a/README.md b/README.md
index 716967c..6a2f38c 100644
--- a/README.md
+++ b/README.md
@@ -3,3 +3,5 @@ raspberrypi
 
 This is a repository containing various Raspberry Pi-based projects.
 
+NOTE: be sure and pull all submodules by issuing the command
+`git submodule update --init --recursive`.