diff --git a/core/migrations/0004_auto_20190715_0912.py b/core/migrations/0004_auto_20190715_0912.py
new file mode 100644
index 0000000..8b66138
--- /dev/null
+++ b/core/migrations/0004_auto_20190715_0912.py
@@ -0,0 +1,30 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.20 on 2019-07-15 09:12
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0003_auto_20190222_1358'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='pin',
+            name='origin',
+            field=models.CharField(blank=True, max_length=256, null=True),
+        ),
+        migrations.AlterField(
+            model_name='pin',
+            name='referer',
+            field=models.CharField(blank=True, max_length=256, null=True),
+        ),
+        migrations.AlterField(
+            model_name='pin',
+            name='url',
+            field=models.CharField(blank=True, max_length=256, null=True),
+        ),
+    ]
diff --git a/core/models.py b/core/models.py
index 08a2543..0de747d 100644
--- a/core/models.py
+++ b/core/models.py
@@ -72,11 +72,11 @@ class Image(BaseImage):
 
 class Pin(models.Model):
     submitter = models.ForeignKey(User)
-    url = models.URLField(null=True, blank=True)
+    url = models.CharField(null=True, blank=True, max_length=256)
     # origin is tha same as referer but not work,
     # should be removed some day
-    origin = models.URLField(null=True, blank=True)
-    referer = models.URLField(null=True, blank=True)
+    origin = models.CharField(null=True, blank=True, max_length=256)
+    referer = models.CharField(null=True, blank=True, max_length=256)
     description = models.TextField(blank=True, null=True)
     image = models.ForeignKey(Image, related_name='pin')
     published = models.DateTimeField(auto_now_add=True)