diff --git a/formsetfield/fields.py b/formsetfield/fields.py
index 44466b9..055f694 100644
--- a/formsetfield/fields.py
+++ b/formsetfield/fields.py
@@ -6,11 +6,21 @@ class FormSetField(forms.Field):
 
     widget = FormSetWidget
 
-    def __init__(self, formset_class, template=None, *args, **kwargs):
+    def __init__(self, formset_class, template=None, formset_class_attrs=None, *args, **kwargs):
         self.formset_class = formset_class
+        self._formset_class_attrs = formset_class_attrs or {}
         self.template = template or 'formsetfield/formsetfield.html'
         super(FormSetField, self).__init__(*args, **kwargs)
 
+    @property
+    def formset_class_attrs(self):
+        return self._formset_class_attrs
+        
+    @formset_class_attrs.setter
+    def formset_class_attrs(self, value):
+        self._formset_class_attrs = value
+        self.widget.attrs['formset_class_attrs'] = value
+
     def validate(self, value):
         if not value.is_valid():
             raise forms.ValidationError(self.error_messages['invalid'])
@@ -19,4 +29,4 @@ def clean(self, value):
         return super(FormSetField, self).clean(value).cleaned_data
 
     def widget_attrs(self, widget):
-        return {'formset_class': self.formset_class, 'template': self.template}
+        return {'formset_class': self.formset_class, 'template': self.template, 'formset_class_attrs': self.formset_class_attrs}
diff --git a/formsetfield/widgets.py b/formsetfield/widgets.py
index 0421169..e7924ea 100644
--- a/formsetfield/widgets.py
+++ b/formsetfield/widgets.py
@@ -7,8 +7,8 @@ class FormSetWidget(forms.Widget):
 
     def render(self, name, value, attrs=None):
         if value is None:
-            value = self.attrs['formset_class'](prefix=name)
-        return render_to_string(self.attrs['template'], {'formset': value})
+            value = self.attrs['formset_class'](prefix=name, **self.attrs['formset_class_attrs'])
+        return render_to_string(self.attrs['template'], {'formset': value, 'formset_args': self.attrs['formset_class_attrs']})
 
     def value_from_datadict(self, data, files, name):
-        return self.attrs['formset_class'](data, files, prefix=name)
+        return self.attrs['formset_class'](data, files, prefix=name, **self.attrs['formset_class_attrs'])