diff --git a/templates/_base.html b/templates/_base.html
index 4be2111..2fe802e 100644
--- a/templates/_base.html
+++ b/templates/_base.html
@@ -25,43 +25,43 @@
 <body>
 {% block body %}
     <div class="wrapper">
-        <nav class="navbar navbar-expand-sm navbar-dark bg-dark">
+        <nav class="navbar navbar-expand-lg navbar-dark bg-dark">
             <div class="container">
                 <a class="navbar-brand" href="{% url 'index' %}">{% settings_value "PRODUCT_INFO" %}</a>
-                <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#mainMenu"
-                        aria-controls="mainMenu" aria-expanded="false" aria-label="Toggle navigation">
+                <button class="navbar-toggler" type="button" data-bs-toggle="collapse"
+                        data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent"
+                        aria-expanded="false" aria-label="Toggle navigation">
                     <span class="navbar-toggler-icon"></span>
                 </button>
-                <div class="collapse navbar-collapse" id="mainMenu">
-                    <ul class="navbar-nav">
+                <div class="collapse navbar-collapse" id="navbarSupportetContent">
+                    <ul class="navbar-nav me-auto mb-2 mb-lg-0">
                         <li class="nav-item">
                             <a class="nav-link" href="{% url 'billard:location_index' %}">Standorte</a>
                         </li>
-                    </ul>
-                    {% if user.is_authenticated %}
-                        <ul class="navbar-nav ml-auto">
+                        {% if user.is_authenticated %}
                             <li class="nav-item dropdown">
-                                <a class="nav-link dropdown-toggle" href="#" id="userMenu" data-toggle="dropdown"
-                                   aria-haspopup="true" aria-expanded="false">
+                                <a class="nav-link dropdown-toggle" href="#" id="userMenu" role="button"
+                                   data-bs-toggle="dropdown" aria-expanded="false">
                                     {{ user.username }}
                                 </a>
-                                <div class="dropdown-menu dropdown-menu-right" aria-labelledby="userMenu">
-                                    <a class="dropdown-item" href="{% url 'billard:my_account' %}">My account</a>
+                                <ul class="dropdown-menu" aria-labelledby="userMenu">
+                                    <li><a class="dropdown-item" href="{% url 'billard:my_account' %}">My account</a>
+                                    </li>
                                     {% if user.is_superuser %}
-                                        <a class="dropdown-item" href="/admin">Administration</a>
+                                        <li><a class="dropdown-item" href="{% url 'admin:index' %}">Administration</a>
+                                        </li>
                                     {% endif %}
-                                    <a class="disabled dropdown-item"
-                                       href="#">{% settings_value "PRODUCT_VERSION" %}</a>
-                                    <div class="dropdown-divider"></div>
-                                    <a class="dropdown-item" href="{% url 'logout' %}">Log out</a>
-                                </div>
+                                    <li><a class="dropdown-item" href="#">{% settings_value "PRODUCT_VERSION" %}</a>
+                                    </li>
+                                    <li><a class="dropdown-item" href="{% url 'logout' %}">Logout</a></li>
+                                </ul>
                             </li>
-                        </ul>
-                    {% else %}
-                        <form class="form-inline ml-auto">
-                            <a href="{% url 'login' %}" class="btn btn-outline-secondary">Log in</a>
-                        </form>
-                    {% endif %}
+                        {% else %}
+                            <form class="form-inline ml-auto">
+                                <a href="{% url 'login' %}" class="btn btn-outline-secondary">Log in</a>
+                            </form>
+                        {% endif %}
+                    </ul>
                 </div>
             </div>
         </nav>
