diff --git a/videodinges/models.py b/videodinges/models.py
index 92a2766..d353eec 100644
--- a/videodinges/models.py
+++ b/videodinges/models.py
@@ -7,15 +7,15 @@ Quality = namedtuple('Quality', ['name', 'width', 'height', 'priority'])
 qualities = (
     Quality(name='360p', width=640, height=360, priority=1),
     Quality(name='480p', width=853, height=480, priority=2),
-    Quality(name='480p', width=1280, height=720, priority=2),
+    Quality(name='720p', width=1280, height=720, priority=2),
     Quality(name='1080p', width=1920, height=1080, priority=1),
 )
 
 
 class Video(models.Model):
     id = models.AutoField(primary_key=True)
-    title = models.CharField()
-    slug = models.CharField()
+    title = models.CharField(max_length=256)
+    slug = models.CharField(max_length=256)
     description = models.TextField()
     created_at = models.DateTimeField(default=datetime.now)
     updated_at = models.DateTimeField(default=datetime.now)
@@ -28,5 +28,5 @@ class Video(models.Model):
 class Transcoding(models.Model):
     id = models.AutoField(primary_key=True)
     video = models.ForeignKey(Video, on_delete=models.CASCADE)
-    quality = models.CharField(choices=(quality.name, quality.name) for quality in qualities)
+    quality = models.CharField(choices=((quality.name, quality.name) for quality in qualities), max_length=128)
     file = models.FileField()