I can not align menu items in the navigation bar to the right

Justify-content-end does not work in the navbar-nav tag

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Seibur</title> <link rel="stylesheet" href="style.css"> <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous"> </head> <body> <div class="header"> <nav class="navbar navbar-expand-sm bg-light"> <a class="navbar-brand" href="#">Navbar</a> <ul class="navbar-nav justify-content-center"> <li class="navbar-item"> <a href="#" class="nav-link">1</a> </li> <li class="navbar-item"> <a href="#" class="nav-link">2</a> </li> <li class="navbar-item"> <a href="#" class="nav-link">3</a> </li> </ul> </nav> </div> </body> </html>

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