diff --git a/url_filter/validators.py b/url_filter/validators.py
index d40d0ca..fa6c5d8 100644
--- a/url_filter/validators.py
+++ b/url_filter/validators.py
@@ -6,7 +6,7 @@
     MinLengthValidator as _MinLengthValidator,
 )
 from django.utils.deconstruct import deconstructible
-from django.utils.translation import ungettext_lazy
+from django.utils.translation import ngettext_lazy
 
 
 @deconstructible
@@ -16,7 +16,7 @@ class MinLengthValidator(_MinLengthValidator):
     """
 
     code = "min_length"
-    message = ungettext_lazy(
+    message = ngettext_lazy(
         "Ensure this value has at least %(limit_value)d items (it has %(show_value)d).",
         "Ensure this value has at least %(limit_value)d items (it has %(show_value)d).",
         "limit_value",
@@ -36,7 +36,7 @@ class MaxLengthValidator(_MaxLengthValidator):
     """
 
     code = "max_length"
-    message = ungettext_lazy(
+    message = ngettext_lazy(
         "Ensure this value has at most %(limit_value)d items (it has %(show_value)d).",
         "Ensure this value has at most %(limit_value)d items (it has %(show_value)d).",
         "limit_value",