diff --git a/Documentation.md b/Documentation.md
index b828ea9..dc2284b 100644
--- a/Documentation.md
+++ b/Documentation.md
@@ -5,4 +5,7 @@
 ```mermaid
 classDiagram
     class Movie
+    class Session
+Session : +beginningHour
+Session : +endHour
 ```
\ No newline at end of file