diff --git a/library/Rules/Json.php b/library/Rules/Json.php
index 1dc5a9e1..0b03fb93 100644
--- a/library/Rules/Json.php
+++ b/library/Rules/Json.php
@@ -36,6 +36,10 @@ final class Json extends AbstractRule
             return false;
         }
 
+        if (function_exists('json_validate')) {
+            return json_validate($input);
+        }
+
         json_decode($input);
 
         return json_last_error() === JSON_ERROR_NONE;