diff --git a/ckeditor/widgets.py b/ckeditor/widgets.py
index 10bdd19..61b5827 100644
--- a/ckeditor/widgets.py
+++ b/ckeditor/widgets.py
@@ -7,7 +7,12 @@ from django.utils.html import conditional_escape
 from django.utils.encoding import force_text
 from django.utils.translation import get_language
 from django.core.exceptions import ImproperlyConfigured
-from django.forms.util import flatatt
+try:
+    # Django >=1.7
+    from django.forms.utils import flatatt
+except ImportError:
+    # Django <1.7
+    from django.forms.util import flatatt
 
 from django.utils.functional import Promise
 from django.utils.encoding import force_text