diff -r e8855ddc1851 -r 177b508612f4 src/hdalab/models/dataviz.py
--- a/src/hdalab/models/dataviz.py	Thu Jun 19 12:47:41 2014 +0200
+++ b/src/hdalab/models/dataviz.py	Fri Jun 20 13:10:39 2014 +0200
@@ -28,7 +28,7 @@
 
 class Country(models.Model):
     
-    dbpedia_uri = models.URLField(verify_exists=False, max_length=255, blank=False, null=False, db_index=True, unique=True)
+    dbpedia_uri = models.URLField(max_length=255, blank=False, null=False, db_index=True, unique=True)
     
     class Meta:
         app_label = 'hdalab'
@@ -43,10 +43,10 @@
 
 class DbpediaFields(models.Model):
 
-    dbpedia_uri = models.URLField(verify_exists=False, max_length=2048, blank=False, null=False, db_index=True, unique=False)
+    dbpedia_uri = models.URLField(max_length=2048, blank=False, null=False, db_index=True, unique=False)
     tag = models.OneToOneField(Tag, blank=True, null=True, db_index=True, related_name="dbpedia_fields")
     abstract = models.TextField(blank=True, null=True)
-    thumbnail = models.URLField(verify_exists=False, max_length=2048, blank=True, null=True, db_index=False)    
+    thumbnail = models.URLField(max_length=2048, blank=True, null=True, db_index=False)    
     label = models.CharField(max_length=2048, unique=False, blank=True, null=True)
 
     class Meta: