diff --git a/docs/images/level3.png b/docs/images/level3.png
index 552f7ae5..9b2194d2 100644
Binary files a/docs/images/level3.png and b/docs/images/level3.png differ
diff --git a/docs/src/05_building_block_view.adoc b/docs/src/05_building_block_view.adoc
index 802c2ebd..76480076 100644
--- a/docs/src/05_building_block_view.adoc
+++ b/docs/src/05_building_block_view.adoc
@@ -85,4 +85,7 @@ Detailed structure of the system. Focused on the components of the _User Interfa
 | *_Question Service_* 
 | Saves the questions.
 
+| *_Friend Service_* 
+| Allows to add, list and remove other users of the app as friends. 
+
 |===