diff --git a/includes/helpers.php b/includes/helpers.php
index 299a7b3..f410f67 100755
--- a/includes/helpers.php
+++ b/includes/helpers.php
@@ -718,7 +718,7 @@ function beep_format_content($text) {
  * Returns the 11-char video ID or ''.
  */
 function beep_youtube_id_from_text($text) {
-    if (!preg_match_all('#(?<![\w.-])(?:https?://)?(?:www\.|m\.)?(?:youtube\.com/(?:watch\?[^#\s]*v=|shorts/|embed/|live/)|youtu\.be/)([A-Za-z0-9_-]{11})(?![A-Za-z0-9_-])#i', (string) $text, $m)) {
+    if (!preg_match_all('~(?<![\w.-])(?:https?://)?(?:www\.|m\.)?(?:youtube\.com/(?:watch\?[^#\s]*v=|shorts/|embed/|live/)|youtu\.be/)([A-Za-z0-9_-]{11})(?![A-Za-z0-9_-])~i', (string) $text, $m)) {
         return '';
     }
     return $m[1][0];