diff --git a/build/media_source/system/js/fields/passwordstrength.es6.js b/build/media_source/system/js/fields/passwordstrength.es6.js
index 17db26e1a1440..eaf00d14401fc 100644
--- a/build/media_source/system/js/fields/passwordstrength.es6.js
+++ b/build/media_source/system/js/fields/passwordstrength.es6.js
@@ -7,6 +7,8 @@
  *
  * Copyright (c) 2014 Thomas Kjærgaard
  *
+ * ADAPTED BY: Joomla for use in the Joomla! CMS
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
@@ -50,7 +52,7 @@ class PasswordStrength {
     // eslint-disable-next-line no-useless-escape
     score += this.constructor.calc(
       value,
-      /[@$!#?=;:*\-_€%&()`´]/g,
+      /[@$!#?=;:*\-_€%&()`´+[\]{}'"\\|,.<>/~^]/g,
       this.special,
       mods,
     );