diff --git a/categories/editor/templatetags/admin_tree_list_tags.py b/categories/editor/templatetags/admin_tree_list_tags.py
index a9f4db5..3a38a4a 100644
--- a/categories/editor/templatetags/admin_tree_list_tags.py
+++ b/categories/editor/templatetags/admin_tree_list_tags.py
@@ -3,12 +3,12 @@ from django.db import models
 from django.template import Library
 from django.contrib.admin.templatetags.admin_list import result_headers, _boolean_icon
 try:
-    from django.contrib.admin.util import lookup_field, display_for_field, label_for_field
+    from django.contrib.admin.utils import lookup_field, display_for_field, label_for_field
 except ImportError:
     from categories.editor.utils import lookup_field, display_for_field, label_for_field
 from django.contrib.admin.views.main import EMPTY_CHANGELIST_VALUE
 from django.core.exceptions import ObjectDoesNotExist
-from django.utils.encoding import smart_unicode, force_unicode
+from django.utils.encoding import smart_text, force_text
 from django.utils.html import escape, conditional_escape
 from django.utils.safestring import mark_safe
 
@@ -44,7 +44,7 @@ def items_for_tree_result(cl, result, form):
                     allow_tags = True
                     result_repr = _boolean_icon(value)
                 else:
-                    result_repr = smart_unicode(value)
+                    result_repr = smart_text(value)
                 # Strip HTML tags in the resulting text, except if the
                 # function has an "allow_tags" attribute set to True.
                 if not allow_tags:
@@ -71,7 +71,7 @@ def items_for_tree_result(cl, result, form):
                     except (AttributeError, ObjectDoesNotExist):
                         pass
 
-        if force_unicode(result_repr) == '':
+        if force_text(result_repr) == '':
             result_repr = mark_safe(' ')
         # If list_display_links not defined, add the link tag to the first field
         if (first and not cl.list_display_links) or field_name in cl.list_display_links:
@@ -88,7 +88,7 @@ def items_for_tree_result(cl, result, form):
             else:
                 attr = pk
             value = result.serializable_value(attr)
-            result_id = repr(force_unicode(value))[1:]
+            result_id = repr(force_text(value))[1:]
             first = False
             if django.VERSION[1] < 4:
                 yield mark_safe('<%s%s>%s<a href="%s"%s>%s</a></%s>' % \
@@ -103,12 +103,12 @@ def items_for_tree_result(cl, result, form):
             # can provide fields on a per request basis
             if form and field_name in form.fields:
                 bf = form[field_name]
-                result_repr = mark_safe(force_unicode(bf.errors) + force_unicode(bf))
+                result_repr = mark_safe(force_text(bf.errors) + force_text(bf))
             else:
                 result_repr = conditional_escape(result_repr)
             yield mark_safe('<td%s>%s</td>' % (row_class, result_repr))
     if form and not form[cl.model._meta.pk.name].is_hidden:
-        yield mark_safe('<td>%s</td>' % force_unicode(form[cl.model._meta.pk.name]))
+        yield mark_safe('<td>%s</td>' % force_text(form[cl.model._meta.pk.name]))
 
 
 class TreeList(list):
diff --git a/categories/editor/tree_editor.py b/categories/editor/tree_editor.py
index c2769da..821f6a6 100644
--- a/categories/editor/tree_editor.py
+++ b/categories/editor/tree_editor.py
@@ -125,7 +125,7 @@ class TreeEditor(admin.ModelAdmin):
         "The 'change list' admin view for this model."
         from django.contrib.admin.views.main import ERROR_FLAG
         from django.core.exceptions import PermissionDenied
-        from django.utils.encoding import force_unicode
+        from django.utils.encoding import force_text
         from django.utils.translation import ungettext
         opts = self.model._meta
         app_label = opts.app_label
@@ -199,15 +199,15 @@ class TreeEditor(admin.ModelAdmin):
 
                 if changecount:
                     if changecount == 1:
-                        name = force_unicode(opts.verbose_name)
+                        name = force_text(opts.verbose_name)
                     else:
-                        name = force_unicode(opts.verbose_name_plural)
+                        name = force_text(opts.verbose_name_plural)
                     msg = ungettext(
                         "%(count)s %(name)s was changed successfully.",
                         "%(count)s %(name)s were changed successfully.",
                         changecount) % {'count': changecount,
                                         'name': name,
-                                        'obj': force_unicode(obj)}
+                                        'obj': force_text(obj)}
                     self.message_user(request, msg)
 
                 return HttpResponseRedirect(request.get_full_path())
@@ -248,7 +248,7 @@ class TreeEditor(admin.ModelAdmin):
                 'All %(total_count)s selected', cl.result_count)
 
             context.update({
-                'module_name': force_unicode(opts.verbose_name_plural),
+                'module_name': force_text(opts.verbose_name_plural),
                 'selection_note': _('0 of %(cnt)s selected') % {'cnt': len(cl.result_list)},
                 'selection_note_all': selection_note_all % {'total_count': cl.result_count},
             })
diff --git a/categories/editor/utils.py b/categories/editor/utils.py
index 11871d1..6664c65 100644
--- a/categories/editor/utils.py
+++ b/categories/editor/utils.py
@@ -1,7 +1,7 @@
 """
 Provides compatibility with Django 1.1
 
-Copied from django.contrib.admin.util
+Copied from django.contrib.admin.utils
 """
 from django.forms.forms import pretty_name
 from django.db import models