diff --git a/classes/timetable.php b/classes/timetable.php
index 6b18c2f..2997202 100755
--- a/classes/timetable.php
+++ b/classes/timetable.php
@@ -83,7 +83,7 @@ class timetable {
              $this->lessons[$i] = array();
              $this->lessons_canceled[$i] = array();
              $this->lessons_event[$i] = array();
-	     for ($j=1; $j<=13; $j++) {
+	     for ($j=1; $j<=15; $j++) {
                 $this->lessons[$i][$j] = array();
                 $this->lessons_canceled[$i][$j] = array();
                 $this->lessons_event[$i][$j] = array();