diff --git a/API-Documentaion.md b/API-Documentaion.md
index cedc670..aec8e0d 100644
--- a/API-Documentaion.md
+++ b/API-Documentaion.md
@@ -29,8 +29,9 @@ Section that contains the specification for the courses get request. /courses re
 }
 ```
 
-### /timetable?courseName={coursename}
-Section that contains the specification for the /timetable/{coursename} get request. /timetable/{coursename} returns 6 arrays (Monday to Saturday) containing the timetable. Each array (day) contains 7 lessons.
+### /timetable?courseName={coursename}&week={week}
+/timetable returns a ArrayList "timetable" which contains a Array of 6 days, each day contains a Array of 6 ArrayLists which contain 0..n lessons. The meta part contains course-name, the actual timetable link, the last update-time and the week index (starting with 0 for the current week)
+
 Each lesson has the following values:
 * lessonID: formate: DAY.TIMESLOT.LESSON, range: 0.0.0 to 5.5.x (0.0.0 = Monday.firstTimeSlot.firstLesson, 5.6.x = Saturday.lastTimeSlot.lastLesson)
 * subject: the lesson subject