diff --git a/app/assets/images/contrast.ico b/app/assets/images/contrast.ico
deleted file mode 100644
index 77c65a5fe8cc6c9b270f59e7687fa25dae563e94..0000000000000000000000000000000000000000
Binary files a/app/assets/images/contrast.ico and /dev/null differ
diff --git a/app/assets/images/contraste.png b/app/assets/images/contraste.png
new file mode 100644
index 0000000000000000000000000000000000000000..acb1f5b8447cf69fbf2645a3b1bb6f215d0ee684
Binary files /dev/null and b/app/assets/images/contraste.png differ
diff --git a/app/assets/images/decrease_font.ico b/app/assets/images/decrease_font.ico
deleted file mode 100644
index a01369e72d6ec36ae940c72aec7d67af928acbab..0000000000000000000000000000000000000000
Binary files a/app/assets/images/decrease_font.ico and /dev/null differ
diff --git a/app/assets/images/fonte_mais.png b/app/assets/images/fonte_mais.png
new file mode 100644
index 0000000000000000000000000000000000000000..53c8d5c33d9671bc2e0ee4f3ac95de40b75307ac
Binary files /dev/null and b/app/assets/images/fonte_mais.png differ
diff --git a/app/assets/images/fonte_menos.png b/app/assets/images/fonte_menos.png
new file mode 100644
index 0000000000000000000000000000000000000000..e0d32fd6f4a2a6d60bdbaa0c4c4e8641d23eff71
Binary files /dev/null and b/app/assets/images/fonte_menos.png differ
diff --git a/app/assets/images/increase_font.ico b/app/assets/images/increase_font.ico
deleted file mode 100644
index 9f3a095eb251ccb0758e95c4ea3f0684b8d56137..0000000000000000000000000000000000000000
Binary files a/app/assets/images/increase_font.ico and /dev/null differ
diff --git a/app/views/shared/application/_header.html.erb b/app/views/shared/application/_header.html.erb
index d615561c4af44dc2e34120676bac8d7a4fa6a7a7..478559917334183f9421dedef7d0c0ac3e799e85 100644
--- a/app/views/shared/application/_header.html.erb
+++ b/app/views/shared/application/_header.html.erb
@@ -14,9 +14,9 @@
           <% end %>
         </h1>
         <h2 class="col-xs-4 col-xs-offset-5">
-          <%= image_tag 'increase_font.ico', onclick: 'resizeText(1)' %>
-          <%= image_tag 'decrease_font.ico', onclick: 'resizeText(-1)' %>
-          <%= image_tag 'contrast.ico', onclick: 'changeContrast()', height: '20px'%>
+          <%= image_tag 'fonte_mais.png', onclick: 'resizeText(1)', height: '30px' %>
+          <%= image_tag 'fonte_menos.png', onclick: 'resizeText(-1)', height: '30px' %>
+          <%= image_tag 'contraste.png', onclick: 'changeContrast()', height: '30px'%>
           <%= link_to 'Login' %>&nbsp;|&nbsp;<%= link_to 'Cadastro' %>
         </h2>
       </div>