diff --git a/common.php b/common.php
index a24da130e..b1e961d7c 100644
--- a/common.php
+++ b/common.php
@@ -304,7 +304,7 @@ function make_rand_str ($len = 10)
 	$str = '';
 	while (strlen($str) < $len)
 	{
-		$str .= str_shuffle(preg_replace('#[^0-9a-zA-Z]#', '', crypt(uniqid(mt_rand(), true), 'salt')));
+		$str .= str_shuffle(preg_replace('#[^0-9a-zA-Z]#', '', password_hash(uniqid(mt_rand(), true), PASSWORD_BCRYPT)));
 	}
 	return substr($str, 0, $len);
 }