diff --git a/tavern/models.py b/tavern/models.py
index 941e5ec..22f7282 100644
--- a/tavern/models.py
+++ b/tavern/models.py
@@ -27,7 +27,7 @@ def __unicode__(self):
         return self.name
 
     def get_absolute_url(self):
-        return reverse("tavern_group_details", slug=self.slug)
+        return reverse("tavern_group_details", args=[str(self.slug)])
 
     def save(self, *args, **kwargs):
         unique_slugify(self, self.name)
@@ -61,7 +61,7 @@ def __unicode__(self):
         return self.name
 
     def get_absolute_url(self):
-        return reverse("tavern_event_details", slug=self.slug)
+        return reverse("tavern_event_details", args=[str(self.slug)])
 
     def save(self, *args, **kwargs):
         unique_slugify(self, self.name)