diff --git a/library/Exceptions/UrlException.php b/library/Exceptions/UrlException.php
index b6dca86c9..47ad931ab 100644
--- a/library/Exceptions/UrlException.php
+++ b/library/Exceptions/UrlException.php
@@ -15,10 +15,10 @@ class UrlException extends ValidationException
 {
     public static $defaultTemplates = [
         self::MODE_DEFAULT => [
-            self::STANDARD => '{{name}} must be an URL',
+            self::STANDARD => '{{name}} must be a URL',
         ],
         self::MODE_NEGATIVE => [
-            self::STANDARD => '{{name}} must not be an URL',
+            self::STANDARD => '{{name}} must not be a URL',
         ],
     ];
 }