diff --git a/Developer-documentation.md b/Developer-documentation.md
index 85c5a60..faa55e9 100644
--- a/Developer-documentation.md
+++ b/Developer-documentation.md
@@ -15,7 +15,10 @@ Our implementation consists of the following modules:
 Note: each module is hosted in its own repository.
 
 # CAFF previewer
+This module is responsible for extracting previews from CAFF files.
 
 # CAFF previewer wrapper
+This module makes communication between the previewer and the web client possible.
 
-# Web client
\ No newline at end of file
+# Web client
+This module provides the web UI for the users.
\ No newline at end of file