diff --git a/bijoe/visualization/forms.py b/bijoe/visualization/forms.py
index 3c44eb1..6a69000 100644
--- a/bijoe/visualization/forms.py
+++ b/bijoe/visualization/forms.py
@@ -116,7 +116,7 @@ class DateRangeWidget(forms.MultiWidget):
                 return None, None, date_range['value']
         return value['start'], value['end'], None
 
-    def render(self, name, value, attrs=None):
+    def render(self, name, value, attrs=None, renderer=None):
         output = super(DateRangeWidget, self).render(name, value, attrs=attrs)
         _id = self.build_attrs(attrs).get('id', None)
         if _id: