diff --git a/app/Helpers/Helper.php b/app/Helpers/Helper.php
index b29f514..a0bb958 100644
--- a/app/Helpers/Helper.php
+++ b/app/Helpers/Helper.php
@@ -6,10 +6,11 @@ class Helper
 {
     static public function stripTags(string $str): string
     {
-        return strip_tags($str, '<h1><h2><h3><h4><h5><h6><p><br><b><i><strong><mark><a><span><div><li><ul><ol><table><thead><td><tr><th><tbody><tfoot><blockquote><section><code><pre><aside><figure><img><iframe>');
+        return strip_tags($str, '<h1><h2><h3><h4><h5><h6><p><br><b><i><u><strong><small><mark><a><span><div><li><ul><ol><table><thead><td><tr><th><tbody><tfoot><blockquote><section><code><pre><aside><figure><figcaption><img><iframe><video><audio><article><canvas><svg><source><legend><label><form><input><button><header><footer><nav><sub><sup><textarea><select><option><progress><hr><address><abbr>');
     }
 
-    static public function properUrl(string $str){
+    static public function properUrl(string $str)
+    {
         $validChars = preg_replace('/[^a-z0-9\-_]/', '-', mb_strtolower($str));
         return preg_replace(['/(-)+/', '/^-/', '/-$/'], ['-', '', ''], $validChars);
     }