diff --git a/app/Models/Calendar.php b/app/Models/Calendar.php
index 2ddcef3..9cde227 100755
--- a/app/Models/Calendar.php
+++ b/app/Models/Calendar.php
@@ -44,7 +44,7 @@ class Calendar extends SoftDeletesModel
 
     public function historyCourses()
     {
-        return $this->hasOne(HistoryCourse::class, 'calendar_id', 'id');
+        return $this->hasMany(HistoryCourse::class, 'calendar_id', 'id');
     }
 
 }