CSS float-right not working in Bootstrap 4 Navbar

I'm trying to get my nav links to float to the right of my navbar, but I can't get it to work. I've tried using the ".float-right", "float-xs-right", and "justify-content-end" bootstrap 4 class, along with using "float: right !important;" in my CSS file, and it still won't work.

Here is the HTML for the navbar of my website:

<div id="navbar" class="navbar navbar-fixed-top">
    <div class="container">
        <div class="row">
            <div class="navbar-brand">
                <img src="images/logo.png" width="88px">
                Scervino Lawn Service
            </div>
            <ul class="nav justify-content-end">
                <li class="nav-item">
                    <a class="nav-link" href="home">Home</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="services">Services</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="about">About Us</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="contact">Contact</a>
                </li>
            </ul>
        </div>
    </div>
</div>

And here is the CSS:

#navbar {
    box-shadow: 0px 0px 11px #000;
    padding: 0;
}

#navbar .navbar-brand {
    font-size: 1.6em;
    font-weight: bold;
    color: #9CCC58;
}

I'm relatively new to the Bootstrap 4 framework, so it's possible that I might just be making a dumb mistake, but hopefully someone can help me. :(