diff --git a/src/Utils/StringUtils.php b/src/Utils/StringUtils.php
index ab2c75f0e8..d40638b151 100644
--- a/src/Utils/StringUtils.php
+++ b/src/Utils/StringUtils.php
@@ -120,7 +120,7 @@ public static function generatePassword(int $length = 10): string
         for ($i = 0; $i < $length; $i++) {
             // Each iteration, pick a random character from the
             // allowable string and append it to the password:
-            $pass .= $allowable_characters[mt_rand(0, $len)];
+            $pass .= $allowable_characters[random_int(0, $len)];
         }
 
         return $pass;