diff --git a/index.html b/index.html
index 0177a5d..05c905c 100644
--- a/index.html
+++ b/index.html
@@ -13,34 +13,34 @@
 
     <body>
         <header>
-            <nav class="navbar navbar-dark bg-dark">
-                <div class="container-fluid">
-                    <h1 class="navbar-brand my-2">HTML site</h1>
-                </div>
+            <nav class="navbar navbar-light bg-light">
+              <div class="container-fluid">
+                <span class="navbar-brand mb-0 h1">HTML site</span>
+              </div>
             </nav>
-        </header>
+          </header>
         <div class="container my-3">
             <div class="row align-items-center mx-auto">
                 <div class="col-lg-3 col-md-4 col-xs-6">
-                    <img src="images/computer1.jpg" class="img-fluid rounded" />
+                    <img src="images/computer1.jpg" class="img-fluid rounded" alt="1"/>
                     <p class="text-center">
                         Super computer
                     </p>
                 </div>
                 <div class="col-lg-3 col-md-4 col-xs-6">
-                    <img src="images/computer2.jpg" class="img-fluid rounded" />
+                    <img src="images/computer2.jpg" class="img-fluid rounded" alt="2"/>
                     <p class="text-center">
                         Cool computer
                     </p>
                 </div>
                 <div class="col-lg-3 col-md-4 col-xs-6">
-                    <img src="images/computer3.jpg" class="img-fluid rounded" />
+                    <img src="images/computer3.jpg" class="img-fluid rounded" alt="3"/>
                     <p class="text-center">
                         Normal laptop
                     </p>
                 </div>
                 <div class="col-lg-3 col-md-4 col-xs-6">
-                    <img src="images/computer4.jpg" class="img-fluid rounded" />
+                    <img src="images/computer4.jpg" class="img-fluid rounded" alt="4"/>
                     <p class="text-center">
                         Old camera
                     </p>
