diff --git a/schedule/models/calendars.py b/schedule/models/calendars.py
index 49d6a897..ad484874 100644
--- a/schedule/models/calendars.py
+++ b/schedule/models/calendars.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from django.contrib.contenttypes import generic
+from django.contrib.contenttypes import fields
 from django.db import models
 from django.db.models import Q
 from django.contrib.auth.models import User
@@ -224,7 +224,7 @@ class CalendarRelation(models.Model):
     calendar = models.ForeignKey(Calendar, verbose_name=_("calendar"))
     content_type = models.ForeignKey(ContentType)
     object_id = models.IntegerField()
-    content_object = generic.GenericForeignKey('content_type', 'object_id')
+    content_object = fields.GenericForeignKey('content_type', 'object_id')
     distinction = models.CharField(_("distinction"), max_length = 20, null=True)
     inheritable = models.BooleanField(_("inheritable"), default=True)
 
diff --git a/schedule/models/events.py b/schedule/models/events.py
index b79e3233..62b33b4a 100644
--- a/schedule/models/events.py
+++ b/schedule/models/events.py
@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from django.contrib.contenttypes import generic
+from django.contrib.contenttypes import fields
 from django.db import models
 from django.db.models import Q
 from django.contrib.auth.models import User
@@ -327,7 +327,7 @@ class EventRelation(models.Model):
     event = models.ForeignKey(Event, verbose_name=_("event"))
     content_type = models.ForeignKey(ContentType)
     object_id = models.IntegerField()
-    content_object = generic.GenericForeignKey('content_type', 'object_id')
+    content_object = fields.GenericForeignKey('content_type', 'object_id')
     distinction = models.CharField(_("distinction"), max_length = 20, null=True)
 
     objects = EventRelationManager()